FIXED RATE PREFERRED SECURITIES GUARANTEE AGREEMENT

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BY AND BETWEEN

1ST SOURCE CORPORATION

AND

STATE STREET BANK AND TRUST COMPANY

--------------------, 1997

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TABLE OF CONTENTS

Page No.

ARTICLE I DEFINITIONS AND INTERPRETATION . . . . . . . 1
Section 1.1. Definitions and Interpretation . . . . . . . 1

ARTICLE II TRUST INDENTURE ACT. . . . . . . . . . . . . 4
Section 2.1. Trust Indenture Act; Application . . . . . . . . 4
Section 2.2. Lists of Holders of Securities . . . . . . . . . 4
Section 2.3. Reports by the Preferred Guarantee
Trustee. . . . . . . . . . . . . . . . . . . 5
Section 2.4. Periodic Reports to Preferred Guarantee
Trustee. . . . . . . . . . . . . . . . . . . 5
Section 2.5. Evidence of Compliance with Conditions
Precedent. . . . . . . . . . . . . . . . . . 5
Section 2.6. Events of Default; Waiver. . . . . . . . . . . . 5
Section 2.7. Event of Default; Notice . . . . . . . . . . . . 5
Section 2.8. Conflicting Interests. . . . . . . . . . . . . . 6

ARTICLE III POWERS, DUTIES AND RIGHTS OF PREFERRED
GUARANTEE TRUSTEE. . . . . . . . . . . . . . 6
Section 3.1. Powers and Duties of the Preferred
Guarantee Trustee. . . . . . . . . . . . . . 6
Section 3.2. Certain Rights of Preferred Guarantee
Trustee. . . . . . . . . . . . . . . . . . . 7
Section 3.3. Not Responsible for Recitals or Issuance of
Guarantee. . . . . . . . . . . . . . . . . . 9

ARTICLE IV PREFERRED GUARANTEE TRUSTEE. . . . . . . . . 9
Section 4.1. Preferred Guarantee Trustee; Eligibility . . . . 9
Section 4.2. Appointment, Removal and Resignation of
Preferred Guarantee Trustees . . . . . . . . 9

ARTICLE V GUARANTEE. . . . . . . . . . . . . . . . . . 10
Section 5.1. Guarantee. . . . . . . . . . . . . . . . . . . . 10
Section 5.2. Waiver of Notice and Demand. . . . . . . . . . . 10
Section 5.3. Obligations not Affected . . . . . . . . . . . . 11
Section 5.4. Rights of Holders. . . . . . . . . . . . . . . . 12
Section 5.5. Guarantee of Payment.. . . . . . . . . . . . . . 12
Section 5.6. Subrogation. . . . . . . . . . . . . . . . . . . 12
Section 5.7. Independent Obligations. . . . . . . . . . . . . 12

ARTICLE VI LIMITATION OF TRANSACTIONS;
SUBORDINATION. . . . . . . . . . . . . . . . 12
Section 6.1. Limitation of Transactions . . . . . . . . . . . 12
Section 6.2. Ranking. . . . . . . . . . . . . . . . . . . . . 13

ARTICLE VII TERMINATION. . . . . . . . . . . . . . . . . 13
Section 7.1. Termination. . . . . . . . . . . . . . . . . . . 13

ARTICLE VIII INDEMNIFICATION. . . . . . . . . . . . . . . 13
Section 8.1. Exculpation. . . . . . . . . . . . . . . . . . . 13
Section 8.2. Indemnification. . . . . . . . . . . . . . . . . 14

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ARTICLE IX MISCELLANEOUS. . . . . . . . . . . . . . . . 14
Section 9.1. Successors and Assigns . . . . . . . . . . . . . 14
Section 9.2. Amendments . . . . . . . . . . . . . . . . . . . 14
Section 9.3. Notices. . . . . . . . . . . . . . . . . . . . . 14
Section 9.4. Benefit. . . . . . . . . . . . . . . . . . . . . 15
Section 9.5. Governing Law. . . . . . . . . . . . . . . . . . 15

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CROSS REFERENCE TABLE

Section of Trust Section of
Indenture Act of Guarantee
1939, as amended Agreement
---------------- ---------

310(a) 4.1(a)
310(b) 4.1(c), 2.8
310(c) Not Applicable
311(a) 2.2(b)
311(b) 2.2(b)
311(c) Not Applicable
312(a) 2.2(a)
312(b) 2.2(b)
313 2.3
314(a) 2.4
314(b) Not Applicable
314(c) 2.5
314(d) Not Applicable
314(e) 1.1, 2.5, 3.2
314(f) 2.1, 3.2
315(a) 3.1(d)
315(b) 2.7
315(c) 3.1
315(d) 3.1(d)
316(a) 1.1, 2.6, 5.4
316(b) 5.3
317(a) 3.1
317(b) Not Applicable
318(a) 2.1(a)
318(b) 2.1
318(c) 2.1(b)

Note: This Cross-Reference Table does not
constitute part of this Agreement and shall not
affect the interpretation of any of its terms or
provisions.

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FIXED RATE PREFERRED SECURITIES GUARANTEE AGREEMENT

THIS FIXED RATE PREFERRED SECURITIES GUARANTEE AGREEMENT (this
"Preferred Securities Guarantee"), dated as of ----------------, 1997
is executed and delivered by 1ST SOURCE CORPORATION, an Indiana
corporation (the "Guarantor"), and STATE STREET BANK AND TRUST
COMPANY, a trust company organized and existing under the laws of
the Commonwealth of Massachusetts, as trustee (the "Preferred
Guarantee Trustee"), for the benefit of the Holders (as defined
herein) from time to time of the Preferred Securities (as defined
herein) of 1st Source Capital Trust I, a Delaware statutory business
trust (the "Trust").

RECITALS

WHEREAS, pursuant to an Amended and Restated Trust Agreement
(the "Trust Agreement"), dated as of ----------------, 1997, among
the trustees of the Trust named therein, the Guarantor, as
depositor, and the holders from time to time of undivided
beneficial interests in the assets of the Trust, the Trust is
issuing on the date hereof ---------- preferred securities, having
an aggregate liquidation amount of $----------, designated the
----% Cumulative Trust Preferred Securities (the "Preferred
Securities");

WHEREAS, as incentive for the Holders to purchase the
Preferred Securities, the Guarantor desires irrevocably and
unconditionally to agree, to the extent set forth in this Preferred
Securities Guarantee, to pay to the Holders of the Preferred
Securities the Guarantee Payments (as defined herein) and to make
certain other payments on the terms and conditions set forth
herein.

NOW, THEREFORE, in consideration of the purchase by each
Holder of Preferred Securities, which purchase the Guarantor hereby
agrees shall benefit the Guarantor, the Guarantor executes and
delivers this Preferred Securities Guarantee for the benefit of the
Holders.

ARTICLE I
DEFINITIONS AND INTERPRETATION

SECTION 1.1. DEFINITIONS AND INTERPRETATION.

In this Preferred Securities Guarantee, unless the context
otherwise requires:

(a) capitalized terms used in this Preferred Securities
Guarantee but not defined in the preamble above have the respective
meanings assigned to them in this Section 1.1;

(b) terms defined in the Trust Agreement as at the date of
execution of this Preferred Securities Guarantee have the same
meaning when used in this Preferred Securities Guarantee;

(d) all references to "the Preferred Securities Guarantee" or
"this Preferred Securities Guarantee" are to this Preferred
Securities Guarantee as modified, supplemented or amended from time
to time;

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(e) all references in this Preferred Securities Guarantee to
Articles and Sections are to Articles and Sections of this
Preferred Securities Guarantee, unless otherwise specified;

(f) a term defined in the Trust Indenture Act has the same
meaning when used in this Preferred Securities Guarantee, unless
otherwise defined in this Preferred Securities Guarantee or unless
the context otherwise requires; and

(g) a reference to the singular includes the plural and vice
versa.

"Affiliate" has the same meaning as given to that term in
Rule 405 of the Securities Act of 1933, as amended, or any
successor rule thereunder.

"Business Day" means any day other than a day on which federal
or state banking institutions in New York, New York are authorized
or required by law, executive order or regulation to close or a day
on which the Corporate Trust Office of the Preferred Guarantee
Trustee is closed for business.

"Corporate Trust Office" means the office of the Preferred
Guarantee Trustee at which the corporate trust business of the
Preferred Guarantee Trustee shall, at any particular time, be
principally administered, which office at the date of execution of
this Agreement is located at ▇▇▇ ▇▇▇▇▇▇▇▇▇▇▇▇▇ ▇▇▇▇▇, ▇▇▇ ▇▇▇▇▇,
▇▇▇▇▇▇, ▇▇▇▇▇▇▇▇▇▇▇▇▇ ▇▇▇▇▇, Attention: Corporate Trust Department.

"Covered Person" means any Holder or beneficial owner of
Preferred Securities.

"Debentures" means the ---% Subordinated Debentures due March
31, 2027, of the Debenture Issuer held by the Property Trustee of
the Trust.

"Debenture Issuer" means the Guarantor.

"Event of Default" means a default by the Guarantor on any of
its payment or other obligations under this Preferred Securities
Guarantee.

"Guarantor" means 1st Source Corporation, an Indiana
corporation.

"Guarantee Payments" means the following payments or
distributions, without duplication, with respect to the Preferred
Securities, to the extent not paid or made by the Trust: (i) any
accrued and unpaid Distributions (as defined in the Trust
Agreement) that are required to be paid on such Preferred
Securities, to the extent the Trust shall have funds available
therefor, (ii) the redemption price, including all accrued and
unpaid Distributions to the date of redemption (the "Redemption
Price"), to the extent the Trust has funds available therefor, with
respect to any Preferred Securities called for redemption by the
Trust, and (iii) upon a voluntary or involuntary dissolution,
winding-up or termination of the Trust (other than in connection
with the distribution of Debentures to the Holders in exchange for
Preferred Securities as provided in the Trust Agreement), the
lesser of (a) the aggregate of the liquidation amount and all
accrued and unpaid Distributions on the Preferred Securities to the
date of payment, to the extent the Trust shall have funds available
therefor (the "Liquidation Distribution"), and (b) the amount of
assets of the Trust remaining available for distribution to Holders
in liquidation of the Trust.

"Holder" shall mean any holder, as registered on the books and
records of the Trust, of any Preferred Securities; provided,
however, that, in determining whether the holders of the requisite

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percentage of Preferred Securities have given any request, notice,
consent or waiver hereunder, "Holder" shall not include the
Guarantor or any Affiliate of the Guarantor.

"Indemnified Person" means the Preferred Guarantee Trustee,
any Affiliate of the Preferred Guarantee Trustee, or any officers,
directors, shareholders, members, partners, employees,
representatives, nominees, custodians or agents of the Preferred
Guarantee Trustee.

"Indenture" means the Indenture dated as of ----------------,
1997 among the Debenture Issuer and State Street Bank and Trust
Company, as trustee, and any indenture supplemental thereto
pursuant to which the Debentures of the Debenture Issuer are to
be issued to the Property Trustee of the Trust.

"Liquidation Distribution" has the meaning provided therefor
in the definition of Guarantee Payments.

"Majority in liquidation amount of the Preferred Securities"
means the holders of more than 50% of the liquidation amount
(including the stated amount that would be paid on redemption,
liquidation or otherwise, plus accrued and unpaid Distributions to
the date upon which the voting percentages are determined) of all
of the Preferred Securities.

"Officers' Certificate" means, with respect to any Person, a
certificate signed by two authorized officers of such Person. Any
Officers' Certificate delivered with respect to compliance with a
condition or covenant provided for in this Preferred Securities
Guarantee shall include:

(a) a statement that each officer signing the Officers'
Certificate has read the covenant or condition and the definition
relating thereto;

(b) a brief statement of the nature and scope of the
examination or investigation undertaken by each officer in
rendering the Officers' Certificate;

(c) a statement that each such officer has made such
examination or investigation as, in such officer's opinion, is
necessary to enable such officer to express an informed opinion as
to whether or not such covenant or condition has been complied
with; and

(d) a statement as to whether, in the opinion of each such
officer, such condition or covenant has been complied with.

"Person" means a legal person, including any individual,
corporation, estate, partnership, joint venture, association, joint
stock company, limited liability company, trust, unincorporated
association, or government or any agency or political subdivision
thereof, or any other entity of whatever nature.

"Preferred Guarantee Trustee" means State Street Bank and
Trust Company, until a Successor Preferred Guarantee Trustee has
been appointed and has accepted such appointment pursuant to the
terms of this Preferred Securities Guarantee and thereafter means
each such Successor Preferred Guarantee Trustee.

"Redemption Price" has the meaning provided therefor in the
definition of Guarantee Payments.

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"Responsible Officer" means, with respect to the Preferred
Guarantee Trustee, any officer within the Corporate Trust Office of
the Preferred Guarantee Trustee, including any vice-president, any
assistant vice-president, any assistant secretary, the treasurer,
any assistant treasurer or other officer of the Corporate Trust
Office of the Preferred Guarantee Trustee customarily performing
functions similar to those performed by any of the above designated
officers and also means, with respect to a particular corporate
trust matter, any other officer to whom such matter is referred
because of that officer's knowledge of and familiarity with the
particular subject.

"Successor Preferred Guarantee Trustee" means a successor
Preferred Guarantee Trustee possessing the qualifications to act as
Preferred Guarantee Trustee under Section 4.1.

"Trust Indenture Act" means the Trust Indenture Act of 1939,
as amended.

ARTICLE II
TRUST INDENTURE ACT

SECTION 2.1. TRUST INDENTURE ACT; APPLICATION.

(a) This Preferred Securities Guarantee is subject to the
provisions of the Trust Indenture Act that are required to be part
of this Preferred Securities Guarantee and shall, to the extent
applicable, be governed by such provisions.

(b) If and to the extent that any provision of this Preferred
Securities Guarantee limits, qualifies or conflicts with the duties
imposed by Section 310 to 317, inclusive, of the Trust Indenture
Act, such imposed duties shall control.

SECTION 2.2. LISTS OF HOLDERS OF SECURITIES.

(a) In the event the Preferred Guarantee Trustee is not also
the Transfer Agent, the Guarantor shall provide the Preferred
Guarantee Trustee with a list, in such form as the Preferred
Guarantee Trustee may reasonably require, of the names and
addresses of the Holders of the Preferred Securities ("List of
Holders") as of such date, (i) within 1 Business Day after
January 1 and June 30 of each year, and (ii) at any other time
within 30 days of receipt by the Guarantor of a written request for
a List of Holders as of a date no more than 15 days before such
List of Holders is given to the Preferred Guarantee Trustee;
provided, that the Guarantor shall not be obligated to provide such
List of Holders at any time the List of Holders does not differ
from the most recent List of Holders given to the Preferred
Guarantee Trustee by the Guarantor. The Preferred Guarantee
Trustee may destroy any List of Holders previously given to it on
receipt of a new List of Holders.

(b) The Preferred Guarantee Trustee shall comply with its
obligations under Sections 311(a), 311(b) and Section 312(b) of the
Trust Indenture Act.

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SECTION 2.3. REPORTS BY THE PREFERRED GUARANTEE TRUSTEE.

On or before July 15 of each year, the Preferred Guarantee
Trustee shall provide to the Holders of the Preferred Securities
such reports as are required by Section 313 of the Trust Indenture
Act, if any, in the form and in the manner provided by Section 313
of the Trust Indenture Act. The Preferred Guarantee Trustee shall
also comply with the requirements of Section 313(d) of the Trust
Indenture Act.

SECTION 2.4. PERIODIC REPORTS TO PREFERRED GUARANTEE TRUSTEE.

The Guarantor shall provide to the Preferred Guarantee Trustee
such documents, reports and information as required by Section 314
(if any) and the compliance certificate required by Section 314 of
the Trust Indenture Act in the form, in the manner and at the times
required by Section 314 of the Trust Indenture Act.

SECTION 2.5. EVIDENCE OF COMPLIANCE WITH CONDITIONS PRECEDENT.

The Guarantor shall provide to the Preferred Guarantee Trustee
such evidence of compliance with any conditions precedent, if any,
provided for in this Preferred Securities Guarantee that relate to
any of the matters set forth in Section 314(c) of the Trust
Indenture Act. Any certificate or opinion required to be given by
an officer pursuant to Section 314(c)(1) may be given in the form
of an Officers' Certificate.

SECTION 2.6. EVENTS OF DEFAULT; WAIVER.

The Holders of a Majority in liquidation amount of Preferred
Securities may, by vote, on behalf of the Holders of all of the
Preferred Securities, waive any past Event of Default and its
consequences. Upon such waiver, any such Event of Default shall
cease to exist, and any Event of Default arising therefrom shall be
deemed to have been cured, for every purpose of this Preferred
Securities Guarantee, but no such waiver shall extend to any
subsequent or other default or Event of Default or impair any right
consequent thereon.

SECTION 2.7. EVENT OF DEFAULT; NOTICE.

(a) The Preferred Guarantee Trustee shall, within 90 days
after the occurrence of an Event of Default, transmit by mail,
first class postage prepaid, to the Holders of the Preferred
Securities, notices of all Events of Default actually known to a
Responsible Officer of the Preferred Guarantee Trustee, unless such
defaults have been cured before the giving of such notice;
provided, that the Preferred Guarantee Trustee shall be protected
in withholding such notice if and so long as a Responsible Officer
of the Preferred Guarantee Trustee in good faith determines that
the withholding of such notice is in the interests of the Holders
of the Preferred Securities.

(b) The Preferred Guarantee Trustee shall not be deemed to
have knowledge of any Event of Default unless the Preferred
Guarantee Trustee shall have received written notice, or of which
a Responsible Officer of the Preferred Guarantee Trustee charged
with the administration of the Trust Agreement shall have obtained
actual knowledge.

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SECTION 2.8. CONFLICTING INTERESTS.

The Trust Agreement shall be deemed to be specifically
described in this Preferred Securities Guarantee for the purposes
of clause (i) of the first proviso contained in Section 310(b) of
the Trust Indenture Act.

ARTICLE III
POWERS, DUTIES AND RIGHTS OF PREFERRED GUARANTEE TRUSTEE

SECTION 3.1. POWERS AND DUTIES OF THE PREFERRED GUARANTEE TRUSTEE.

(a) This Preferred Securities Guarantee shall be held by the
Preferred Guarantee Trustee for the benefit of the Holders of the
Preferred Securities, and the Preferred Guarantee Trustee shall not
transfer this Preferred Securities Guarantee to any Person except
a Holder of Preferred Securities exercising his or her rights
pursuant to Section 5.4(b) or to a Successor Preferred Guarantee
Trustee on acceptance by such Successor Preferred Guarantee Trustee
of its appointment to act as Successor Preferred Guarantee Trustee.
The right, title and interest of the Preferred Guarantee Trustee
shall automatically vest in any Successor Preferred Guarantee
Trustee, and such vesting and cessation of title shall be effective
whether or not conveyancing documents have been executed and
delivered pursuant to the appointment of such Successor Preferred
Guarantee Trustee.

(b) If an Event of Default actually known to a Responsible
Officer of the Preferred Guarantee Trustee has occurred and is
continuing, the Preferred Guarantee Trustee shall enforce this
Preferred Securities Guarantee for the benefit of the Holders of
the Preferred Securities.

(c) The Preferred Guarantee Trustee, before the occurrence of
any Event of Default and after the curing of all Events of Default
that may have occurred, shall undertake to perform only such duties
as are specifically set forth in this Preferred Securities
Guarantee, and no implied covenants shall be read into this
Preferred Securities Guarantee against the Preferred Guarantee
Trustee. In case an Event of Default has occurred (that has not
been cured or waived pursuant to Section 2.6) and is actually known
to a Responsible Officer of the Preferred Guarantee Trustee, the
Preferred Guarantee Trustee shall exercise such of the rights and
powers vested in it by this Preferred Securities Guarantee, and use
the same degree of care and skill in its exercise thereof, as a
prudent person would exercise or use under the circumstances in the
conduct of his or her own affairs.

(d) No provision of this Preferred Securities Guarantee shall
be construed to relieve the Preferred Guarantee Trustee from
liability for its own negligent action, its own negligent failure
to act, or its own willful misconduct, except that:

(i) prior to the occurrence of any Event of Default and
after the curing or waiving of all such Events of Default that may
have occurred:

(A) the duties and obligations of the Preferred
Guarantee Trustee shall be determined solely by the express
provisions of this Preferred Securities Guarantee, and the
Preferred Guarantee Trustee shall not be liable except for the
performance of such duties and obligations as are specifically set
forth in this Preferred Securities Guarantee, and no implied
covenants or obligations shall be read into this Preferred
Securities Guarantee against the Preferred Guarantee Trustee; and

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(B) in the absence of bad faith on the part of the
Preferred Guarantee Trustee, the Preferred Guarantee Trustee may
conclusively rely, as to the truth of the statements and the
correctness of the opinions expressed therein, upon any
certificates or opinions furnished to the Preferred Guarantee
Trustee and conforming to the requirements of this Preferred
Securities Guarantee; but in the case of any such certificates or
opinions that by any provision hereof are specifically required to
be furnished to the Preferred Guarantee Trustee, the Preferred
Guarantee Trustee shall be under a duty to examine the same to
determine whether or not they conform to the requirements of this
Preferred Securities Guarantee;

(ii) the Preferred Guarantee Trustee shall not be liable
for any error of judgment made in good faith by a Responsible
Officer of the Preferred Guarantee Trustee, unless it shall be
proved that the Preferred Guarantee Trustee was negligent in
ascertaining the pertinent facts upon which such judgment was made;

(iii) the Preferred Guarantee Trustee shall not be
liable with respect to any action taken or omitted to be taken by
it in good faith in accordance with the direction of the Holders of
not less than a Majority in liquidation amount of the Preferred
Securities relating to the time, method and place of conducting any
proceeding for any remedy available to the Preferred Guarantee
Trustee, or exercising any trust or power conferred upon the
Preferred Guarantee Trustee under this Preferred Securities
Guarantee; and

(iv) no provision of this Preferred Securities Guarantee
shall require the Preferred Guarantee Trustee to expend or risk its
own funds or otherwise incur personal financial liability in the
performance of any of its duties or in the exercise of any of its
rights or powers, if the Preferred Guarantee Trustee shall have
reasonable grounds for believing that the repayment of such funds
or liability is not reasonably assured to it under the terms of
this Preferred Securities Guarantee or indemnity, reasonably
satisfactory to the Preferred Guarantee Trustee, against such risk
or liability is not reasonably assured to it.

SECTION 3.2. CERTAIN RIGHTS OF PREFERRED GUARANTEE TRUSTEE.

(a) Subject to the provisions of Section 3.1:

(i) the Preferred Guarantee Trustee may conclusively
rely, and shall be fully protected in acting or refraining from
acting upon, any resolution, certificate, statement, instrument,
opinion, report, notice, request, direction, consent, order, bond,
debenture, note, other evidence of indebtedness or other paper or
document believed by it to be genuine and to have been signed, sent
or presented by the proper party or parties;

(ii) any direction or act of the Guarantor contemplated
by this Preferred Securities Guarantee shall be sufficiently
evidenced by an Officers' Certificate;

(iii) whenever, in the administration of this Preferred
Securities Guarantee, the Preferred Guarantee Trustee shall deem it
desirable that a matter be proved or established before taking,
suffering or omitting any action hereunder, the Preferred Guarantee
Trustee (unless other evidence is herein specifically prescribed)
may, in the absence of bad faith on its part, request and
conclusively rely upon an Officers' Certificate which, upon receipt
of such request, shall be promptly delivered by the Guarantor;

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(iv) the Preferred Guarantee Trustee shall have no duty
to see to any recording, filing or registration of any instrument
(or any rerecording, refiling or registration thereof);

(v) the Preferred Guarantee Trustee may consult with
counsel, and the written advice or opinion of such counsel with
respect to legal matters shall be full and complete authorization
and protection in respect of any action taken, suffered or omitted
by it hereunder in good faith and in accordance with such advice or
opinion. Such counsel may be counsel to the Guarantor or any of
its Affiliates and may include any of its employees. The Preferred
Guarantee Trustee shall have the right at any time to seek
instructions concerning the administration of this Preferred
Securities Guarantee from any court of competent jurisdiction;

(vi) the Preferred Guarantee Trustee shall be under no
obligation to exercise any of the rights or powers vested in it by
this Preferred Securities Guarantee at the request or direction of
any Holder, unless such Holder shall have provided to the Preferred
Guarantee Trustee such security and indemnity, reasonably
satisfactory to the Preferred Guarantee Trustee, against the costs,
expenses (including attorneys' fees and expenses and the expenses
of the Preferred Guarantee Trustee's agents, nominees or
custodians) and liabilities that might be incurred by it in
complying with such request or direction, including such reasonable
advances as may be requested by the Preferred Guarantee Trustee;
provided that, nothing contained in this Section 3.2(a)(vi) shall
be taken to relieve the Preferred Guarantee Trustee, upon the
occurrence of an Event of Default, of its obligation to exercise
the rights and powers vested in it by this Preferred Securities
Guarantee;

(vii) the Preferred Guarantee Trustee shall not be bound
to make any investigation into the facts or matters stated in any
resolution, certificate, statement, instrument, opinion, report,
notice, request, direction, consent, order, bond, debenture, note,
other evidence of indebtedness or other paper or document, but the
Preferred Guarantee Trustee, in its discretion, may make such
further inquiry or investigation into such facts or matters as it
may see fit;

(viii) the Preferred Guarantee Trustee may execute any
of the trusts or powers hereunder or perform any duties hereunder
either directly or by or through agents, nominees, custodians or
attorneys, and the Preferred Guarantee Trustee shall not be
responsible for any misconduct or negligence on the part of any
agent or attorney appointed with due care by it hereunder;

(ix) any action taken by the Preferred Guarantee Trustee
or its agents hereunder shall bind the Holders of the Preferred
Securities, and the signature of the Preferred Guarantee Trustee or
its agents alone shall be sufficient and effective to perform any
such action. No third party shall be required to inquire as to the
authority of the Preferred Guarantee Trustee to so act or as to its
compliance with any of the terms and provisions of this Preferred
Securities Guarantee, both of which shall be conclusively evidenced
by the Preferred Guarantee Trustee's or its agent's taking such
action;

(x) whenever in the administration of this Preferred
Securities Guarantee the Preferred Guarantee Trustee shall deem it
desirable to receive instructions with respect to enforcing any
remedy or right or taking any other action hereunder, the Preferred
Guarantee Trustee (i) may request instructions from the Holders of
a Majority in liquidation amount of the Preferred Securities,
(ii) may refrain from enforcing such remedy or right or taking such
other action until such instructions are received, and (iii) shall
be protected in conclusively relying on or acting in accordance
with such instructions.

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(b) No provision of this Preferred Securities Guarantee shall
be deemed to impose any duty or obligation on the Preferred
Guarantee Trustee to perform any act or acts or exercise any right,
power, duty or obligation conferred or imposed on it in any
jurisdiction in which it shall be illegal, or in which the
Preferred Guarantee Trustee shall be unqualified or incompetent in
accordance with applicable law, to perform any such act or acts or
to exercise any such right, power, duty or obligation. No
permissive power or authority available to the Preferred Guarantee
Trustee shall be construed to be a duty.

SECTION 3.3. NOT RESPONSIBLE FOR RECITALS OR ISSUANCE OF
GUARANTEE.

The Recitals contained in this Guarantee shall be taken as the
statements of the Guarantor, and the Preferred Guarantee Trustee
does not assume any responsibility for their correctness. The
Preferred Guarantee Trustee makes no representation as to the
validity or sufficiency of this Preferred Securities Guarantee.

ARTICLE IV
PREFERRED GUARANTEE TRUSTEE

SECTION 4.1. PREFERRED GUARANTEE TRUSTEE; ELIGIBILITY.

(a) There shall at all times be a Preferred Guarantee Trustee
which shall:

(i) not be an Affiliate of the Guarantor; and

(ii) be a corporation organized and doing business under
the laws of the United States of America or any State or Territory
thereof or of the District of Columbia, or a corporation or Person
permitted by the Securities and Exchange Commission to act as an
institutional trustee under the Trust Indenture Act, authorized
under such laws to exercise corporate trust powers, having a
combined capital and surplus of at least $50,000,000, and subject
to supervision or examination by Federal, State, Territorial or
District of Columbia authority. If such corporation publishes
reports of condition at least annually, pursuant to law or to the
requirements of the supervising or examining authority referred to
above, then, for the purposes of this Section 4.1(a)(ii), the
combined capital and surplus of such corporation shall be deemed to
be its combined capital and surplus as set forth in its most recent
report of condition so published.

(b) If at any time the Preferred Guarantee Trustee shall
cease to be eligible to so act under Section 4.1(a), the Preferred
Guarantee Trustee shall immediately resign in the manner and with
the effect set out in Section 4.2(c).

(c) If the Preferred Guarantee Trustee has or shall acquire
any "conflicting interest" within the meaning of Section 310(b) of
the Trust Indenture Act, the Preferred Guarantee Trustee and
Guarantor shall in all respects comply with the provisions of
Section 310(b) of the Trust Indenture Act.

SECTION 4.2. APPOINTMENT, REMOVAL AND RESIGNATION OF PREFERRED
GUARANTEE TRUSTEES.

(a) Subject to Section 4.2(b), the Preferred Guarantee
Trustee may be appointed or removed without cause at any time by
the Guarantor.

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(b) The Preferred Guarantee Trustee shall not be removed in
accordance with Section 4.2(a) until a Successor Preferred
Guarantee Trustee has been appointed and has accepted such
appointment by written instrument executed by such Successor
Preferred Guarantee Trustee and delivered to the Guarantor.

(c) The Preferred Guarantee Trustee appointed to office shall
hold office until a Successor Preferred Guarantee Trustee shall
have been appointed or until its removal or resignation. The
Preferred Guarantee Trustee may resign from office (without need
for prior or subsequent accounting) by an instrument in writing
executed by the Preferred Guarantee Trustee and delivered to the
Guarantor, which resignation shall not take effect until a
Successor Preferred Guarantee Trustee has been appointed and has
accepted such appointment by instrument in writing executed by such
Successor Preferred Guarantee Trustee and delivered to the
Guarantor and the resigning Preferred Guarantee Trustee.

(d) If no Successor Preferred Guarantee Trustee shall have
been appointed and accepted appointment as provided in this
Section 4.2 within 60 days after delivery to the Guarantor of an
instrument of resignation, the resigning Preferred Guarantee
Trustee may petition any court of competent jurisdiction for
appointment of a Successor Preferred Guarantee Trustee. Such court
may thereupon, after prescribing such notice, if any, as it may
deem proper, appoint a Successor Preferred Guarantee Trustee.

(e) No Preferred Guarantee Trustee shall be liable for the
acts or omissions to act of any Successor Preferred Guarantee
Trustee.

(f) Upon termination of this Preferred Securities Guarantee
or removal or resignation of the Preferred Guarantee Trustee
pursuant to this Section 4.2, the Guarantor shall pay to the
Preferred Guarantee Trustee all amounts accrued to the date of such
termination, removal or resignation.

ARTICLE V
GUARANTEE

SECTION 5.1. GUARANTEE.

The Guarantor irrevocably and unconditionally agrees to pay in
full to the Holders the Guarantee Payments (without duplication of
amounts theretofore paid by the Trust), as and when due, regardless
of any defense, right of set-off or counterclaim that the Trust may
have or assert. The Guarantor's obligation to make a Guarantee
Payment may be satisfied by direct payment of the required amounts
by the Guarantor to the Holders or by causing the Trust to pay such
amounts to the Holders.

SECTION 5.2. WAIVER OF NOTICE AND DEMAND.

The Guarantor hereby waives notice of acceptance of this
Preferred Securities Guarantee and of any liability to which it
applies or may apply, presentment, demand for payment, any right to
require a proceeding first against the Trust or any other Person
before proceeding against the Guarantor, protest, notice of
nonpayment, notice of dishonor, notice of redemption and all other
notices and demands.

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SECTION 5.3. OBLIGATIONS NOT AFFECTED.

The obligations, covenants, agreements and duties of the
Guarantor under this Preferred Securities Guarantee shall in no way
be affected or impaired by reason of the happening from time to
time of any of the following:

(a) the release or waiver, by operation of law or otherwise,
of the performance or observance by the Trust of any express or
implied agreement, covenant, term or condition relating to the
Preferred Securities to be performed or observed by the Trust;

(b) the extension of time for the payment by the Trust of all
or any portion of the Distributions, Redemption Price, Liquidation
Distribution or any other sums payable under the terms of the
Preferred Securities or the extension of time for the performance
of any other obligation under, arising out of, or in connection
with, the Preferred Securities (other than an extension of time for
payment of Distributions, Redemption Price, Liquidation
Distribution or other sum payable that results from the extension
of any interest payment period on the Debentures or any extension
of the maturity date of the Debentures permitted by the Indenture);

(c) any failure, omission, delay or lack of diligence on the
part of the Holders to enforce, assert or exercise any right,
privilege, power or remedy conferred on the Holders pursuant to the
terms of the Preferred Securities, or any action on the part of the
Trust granting indulgence or extension of any kind;

(d) the voluntary or involuntary liquidation, dissolution,
sale of any collateral, receivership, insolvency, bankruptcy,
assignment for the benefit of creditors, reorganization,
arrangement, composition or readjustment of debt of, or other
similar proceedings affecting, the Trust or any of the assets of
the Trust;

(e) any invalidity of, or defect or deficiency in, the
Preferred Securities;

(f) any failure or omission to receive any regulatory
approval or consent required in connection with the Preferred
Securities (or the common equity securities issued by the Trust),
including the failure to receive any approval of the Board of
Governors of the Federal Reserve System required for the redemption
of the Preferred Securities;

(g) the settlement or compromise of any obligation guaranteed
hereby or hereby incurred; or

(h) any other circumstance whatsoever that might otherwise
constitute a legal or equitable discharge or defense of a
guarantor, it being the intent of this Section 5.3 that the
obligations of the Guarantor hereunder shall be absolute and
unconditional under any and all circumstances.

There shall be no obligation of the Holders to give notice to,
or obtain consent of, the Guarantor with respect to the happening
of any of the foregoing.

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SECTION 5.4. RIGHTS OF HOLDERS.

(a) The Holders of a Majority in liquidation amount of the
Preferred Securities have the right to direct the time, method and
place of conducting of any proceeding for any remedy available to
the Preferred Guarantee Trustee in respect of this Preferred
Securities Guarantee or exercising any trust or power conferred
upon the Preferred Guarantee Trustee under this Preferred
Securities Guarantee.

(b) Any Holder of Preferred Securities may institute a legal
proceeding directly against the Guarantor to enforce its rights
under this Preferred Securities Guarantee, without first
instituting a legal proceeding against the Trust, the Preferred
Guarantee Trustee or any other Person.

SECTION 5.5. GUARANTEE OF PAYMENT.

This Preferred Securities Guarantee creates a guarantee of
payment and not of collection.

SECTION 5.6. SUBROGATION.

The Guarantor shall be subrogated to all (if any) rights of
the Holders of Preferred Securities against the Trust in respect of
any amounts paid to such Holders by the Guarantor under this
Preferred Securities Guarantee; provided, however, that the
Guarantor shall not (except to the extent required by mandatory
provisions of law) be entitled to enforce or exercise any right
that it may acquire by way of subrogation or any indemnity,
reimbursement or other agreement, in all cases as a result of
payment under this Preferred Securities Guarantee, if, at the time
of any such payment, any amounts are due and unpaid under this
Preferred Securities Guarantee. If any amount shall be paid to the
Guarantor in violation of the preceding sentence, the Guarantor
agrees to hold such amount in trust for the Holders and to pay over
such amount to the Holders.

SECTION 5.7. INDEPENDENT OBLIGATIONS.

The Guarantor acknowledges that its obligations hereunder are
independent of the obligations of the Trust with respect to the
Preferred Securities, and that the Guarantor shall be liable as
principal and as debtor hereunder to make Guarantee Payments
pursuant to the terms of this Preferred Securities Guarantee
notwithstanding the occurrence of any event referred to in
subsections (a) through (h), inclusive, of Section 5.3 hereof.

ARTICLE VI
LIMITATION OF TRANSACTIONS; SUBORDINATION

SECTION 6.1. LIMITATION OF TRANSACTIONS.

So long as any Preferred Securities remain outstanding, if
there shall have occurred an Event of Default under this Preferred
Securities Guarantee, an Event of Default under the Trust Agreement
or during an Extended Interest Payment Period (as defined in the
Indenture), then (a) the Guarantor shall not declare or pay any
dividend on, make any distributions with respect to, or redeem,
purchase, acquire or make a liquidation payment with respect to,
any of its capital stock (other than (i) dividends or distributions
in common stock of the Guarantor or any declaration of a non-cash
dividend in connection with the implementation of a shareholders'
rights plan, or the issuance of stock under any such plan in

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the future, or the redemption or repurchase of any such rights pursuant
thereto, and (ii) purchases of common stock of the Guarantor
related to the rights under any of the Guarantor's benefit plans
for its directors, officers or employees) and (b) the Guarantor
shall not make any payment of interest or principal on or repay,
repurchase or redeem any debt securities issued by the Guarantor
which rank pari passu with or junior to the Debentures.

SECTION 6.2 RANKING.

This Preferred Securities Guarantee will constitute an
unsecured obligation of the Guarantor and will rank (i) subordinate
and junior in right of payment to all other liabilities of the
Guarantor, (ii) pari passu with the most senior preferred
securities or preference stock now or hereafter issued by the
Guarantor and with any guarantee now or hereafter entered into by
the Guarantor in respect of any preferred securities or preference
stock of any Affiliate of the Guarantor, and (iii) senior to the
Guarantor's common stock.

ARTICLE VII
TERMINATION

SECTION 7.1. TERMINATION.

This Preferred Securities Guarantee shall terminate upon
(i) full payment of the Redemption Price of all Preferred
Securities, (ii) upon full payment of the amounts payable in
accordance with the Trust Agreement upon liquidation of the Trust,
or (iii) upon distribution of the Debentures to the Holders of the
Preferred Securities. Notwithstanding the foregoing, this
Preferred Securities Guarantee shall continue to be effective or
shall be reinstated, as the case may be, if at any time any Holder
of Preferred Securities must restore payment of any sums paid under
the Preferred Securities or under this Preferred Securities
Guarantee.

ARTICLE VIII
INDEMNIFICATION

SECTION 8.1. EXCULPATION.

(a) No Indemnified Person shall be liable, responsible or
accountable in damages or otherwise to the Guarantor or any Covered
Person for any loss, damage or claim incurred by reason of any act
or omission performed or omitted by such Indemnified Person in good
faith in accordance with this Preferred Securities Guarantee and in
a manner that such Indemnified Person reasonably believed to be
within the scope of the authority conferred on such Indemnified
Person by this Preferred Securities Guarantee or by law, except
that an Indemnified Person shall be liable for any such loss,
damage or claim incurred by reason of such Indemnified Person's
negligence or willful misconduct with respect to such acts or
omissions.

(b) An Indemnified Person shall be fully protected in relying
in good faith upon the records of the Guarantor and upon such
information, opinions, reports or statements presented to the
Guarantor by any Person as to matters the Indemnified Person
reasonably believes are within such other Person's professional or
expert competence and who has been selected with reasonable care by
or on behalf of the

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Guarantor, including information, opinions, reports or statements as to the
value and amount of the assets, liabilities, profits, losses, or any other
facts pertinent to the existence and amount of assets from which Distributions
to Holders of Preferred Securities might properly be paid.

SECTION 8.2. INDEMNIFICATION.

The Guarantor agrees to indemnify each Indemnified Person for,
and to hold each Indemnified Person harmless against, any loss,
liability or expense incurred without negligence or bad faith on
its part, arising out of or in connection with the acceptance or
administration of the trust or trusts hereunder, including the
costs and expenses (including reasonable legal fees and expenses)
of defending itself against, or investigating, any claim or
liability in connection with the exercise or performance of any of
its powers or duties hereunder. The obligation to indemnify as set
forth in this Section 8.2 shall survive the termination of this
Preferred Securities Guarantee.

ARTICLE IX
MISCELLANEOUS

SECTION 9.1. SUCCESSORS AND ASSIGNS.

All guarantees and agreements contained in this Preferred
Securities Guarantee shall bind the successors, assigns, receivers,
trustees and representatives of the Guarantor and shall inure to
the benefit of the Holders of the Preferred Securities then
outstanding.

SECTION 9.2. AMENDMENTS.

Except with respect to any changes that do not materially
adversely affect the rights of Holders (in which case no consent of
Holders will be required), this Preferred Securities Guarantee may
only be amended with the prior approval of the Holders of at least
a Majority in liquidation amount of the Preferred Securities. The
provisions of Article VI of the Trust Agreement with respect to
meetings of Holders of the Preferred Securities apply to the giving
of such approval.

SECTION 9.3. NOTICES.

All notices provided for in this Preferred Securities
Guarantee shall be in writing, duly signed by the party giving such
notice, and shall be delivered, telecopied or mailed by registered
or certified mail, as follows:

(a) If given to the Preferred Guarantee Trustee, at the
Preferred Guarantee Trustee's mailing address set forth below (or
such other address as the Preferred Guarantee Trustee may give
notice of to the Holders of the Preferred Securities):

State Street Bank and Trust Company
▇▇▇ ▇▇▇▇▇▇▇▇▇▇▇▇▇ ▇▇▇▇▇, ▇▇▇ ▇▇▇▇▇
▇▇▇▇▇▇, ▇▇▇▇▇▇▇▇▇▇▇▇▇ ▇▇▇▇▇
Attention: Corporate Trust Department

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(b) If given to the Guarantor, at the Guarantor's mailing
address set forth below (or such other address as the Guarantor may
give notice of to the Holders of the Preferred Securities):

1st Source Corporation
▇▇▇ ▇▇▇▇▇ ▇▇▇▇▇▇▇▇ ▇▇▇▇▇▇
▇▇▇▇▇ ▇▇▇▇, ▇▇▇▇▇▇▇ ▇▇▇▇▇
Attention: Chief Financial Officer

All such notices shall be deemed to have been given when
received in person, telecopied with receipt confirmed, or mailed by
first class mail, postage prepaid except that if a notice or other
document is refused delivery or cannot be delivered because of a
changed address of which no notice was given, such notice or other
document shall be deemed to have been delivered on the date of such
refusal or inability to deliver.

SECTION 9.4. BENEFIT.

This Preferred Securities Guarantee is solely for the benefit
of the Holders of the Preferred Securities and, subject to
Section 3.1(a), is not separately transferable from the Preferred
Securities.

SECTION 9.5. GOVERNING LAW.

THIS PREFERRED SECURITIES GUARANTEE SHALL BE GOVERNED BY, AND
CONSTRUED AND INTERPRETED IN ACCORDANCE WITH, THE LAWS OF THE STATE
OF INDIANA.

This Preferred Securities Guarantee is executed as of the day
and year first above written.

1ST SOURCE CORPORATION
as Guarantor

By:-----------------------------------
Name:---------------------------------
Title:--------------------------------

STATE STREET BANK AND TRUST COMPANY,
as Preferred Guarantee Trustee

By:-----------------------------------
Name:---------------------------------
Title:--------------------------------

FIXED RATE PREFERRED SECURITIES GUARANTEE AGREEMENT

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