<PAGE>
UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549
OMB APPROVAL
OMB NUMBER 3235-0145
EXPIRES: OCTOBER 31, 1994
ESTIMATED AVERAGE BURDEN
HOURS PER RESPONSE . . . 14.90
SCHEDULE 13G
UNDER THE SECURITIES EXCHANGE ACT OF 1934
(AMENDMENT NO. 2)*
COMMONWEALTH EDISON COMPANY
----------------------------------------------------------
(Name of Issuer)
CUMULATIVE PREFERENCE STOCK WITHOUT PAR VALUE
----------------------------------------------------------
(Title of Class of Securities)
202795746
----------------------------------------
(CUSIP Number)
Check the following box if a fee is being paid with this statement [_]. (A fee
is not required only if the filing person: (1) has a previous statement on
file reporting beneficial ownership of more than five percent of the class of
securities described in Item 1; and (2) has filed no amendment subsequent
thereto reporting beneficial ownership of five percent or less of such class.)
(See Rule 13d-7).
*The remainder of this cover page shall be filled out for a reporting person's
initial filing on this form with respect to the subject class of securities, and
for any subsequent amendment containing information which would alter the
disclosures provided in a prior cover page.
The information required in the remainder of this cover page shall not be deemed
to be "filed" for the purpose of Section 18 of the Securities Exchange Act of
1934 ("Act") or otherwise subject to the liabilities of that section of the Act
but shall be subject to all other provisions of the Act (however, see the
Notes).
PAGE 1 OF 12 PAGES
<PAGE>
CUSIP NO. 202795746 13G PAGE 2 OF 12 PAGES
- --------------------------------------------------------------------------------
1 NAME OF REPORTING PERSON
S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
John Hancock Mutual Life Insurance Company
I.R.S. No. 04-1414660
- --------------------------------------------------------------------------------
2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) [_]
(b) [_]
N/A
- --------------------------------------------------------------------------------
3 SEC USE ONLY
- --------------------------------------------------------------------------------
4 CITIZENSHIP OR PLACE OF ORGANIZATION
Commonwealth of Massachusetts
- --------------------------------------------------------------------------------
5 SOLE VOTING POWER
Number of
Shares -0-
------------------------------------------------------------------
Beneficially 6 SHARED VOTING POWER
Owned by
Each -0-
------------------------------------------------------------------
Reporting 7 SOLE DISPOSITIVE POWER
Person
With -0-
------------------------------------------------------------------
8 SHARED DISPOSITIVE POWER
-0-
- --------------------------------------------------------------------------------
9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
None except through its indirect, wholly-owned subsidiary, John Hancock
Advisers, Inc.
- --------------------------------------------------------------------------------
10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*
N/A
- --------------------------------------------------------------------------------
11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
See line 9, above.
- --------------------------------------------------------------------------------
12 TYPE OF REPORTING PERSON*
IC, BD, IA, HC
- --------------------------------------------------------------------------------
*SEE INSTRUCTIONS BEFORE FILLING OUT!
PAGE 2 OF 12 PAGES
<PAGE>
CUSIP NO. 202795746 13G PAGE 3 OF 12 PAGES
- --------------------------------------------------------------------------------
1 NAME OF REPORTING PERSON
S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
John Hancock Subsidiaries, Inc.
I.R.S. No. 04-2687223
- --------------------------------------------------------------------------------
2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) [_]
(b) [_]
N/A
- --------------------------------------------------------------------------------
3 SEC USE ONLY
- --------------------------------------------------------------------------------
4 CITIZENSHIP OR PLACE OF ORGANIZATION
Delaware
- --------------------------------------------------------------------------------
5 SOLE VOTING POWER
Number of
Shares -0-
------------------------------------------------------------------
Beneficially 6 SHARED VOTING POWER
Owned by
Each -0-
------------------------------------------------------------------
Reporting 7 SOLE DISPOSITIVE POWER
Person
With -0-
------------------------------------------------------------------
8 SHARED DISPOSITIVE POWER
-0-
- --------------------------------------------------------------------------------
9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
None except through its indirect, wholly-owned subsidiary, John Hancock
Advisers, Inc.
- --------------------------------------------------------------------------------
10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*
N/A
- --------------------------------------------------------------------------------
11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
See line 9, above.
- --------------------------------------------------------------------------------
12 TYPE OF REPORTING PERSON*
HC
- --------------------------------------------------------------------------------
*SEE INSTRUCTIONS BEFORE FILLING OUT!
PAGE 3 OF 12 PAGES
<PAGE>
CUSIP NO. 202795746 13G PAGE 4 OF 12 PAGES
- --------------------------------------------------------------------------------
1 NAME OF REPORTING PERSON
S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
The Berkeley Financial Group
I.R.S. No. 04-3145626
- --------------------------------------------------------------------------------
2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) [_]
(b) [_]
N/A
- --------------------------------------------------------------------------------
3 SEC USE ONLY
- --------------------------------------------------------------------------------
4 CITIZENSHIP OR PLACE OF ORGANIZATION
Commonwealth of Massachusetts
- --------------------------------------------------------------------------------
5 SOLE VOTING POWER
Number of
Shares -0-
------------------------------------------------------------------
Beneficially 6 SHARED VOTING POWER
Owned by
Each -0-
------------------------------------------------------------------
Reporting 7 SOLE DISPOSITIVE POWER
Person
With -0-
------------------------------------------------------------------
8 SHARED DISPOSITIVE POWER
-0-
- --------------------------------------------------------------------------------
9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
None except through its direct, wholly-owned subsidiary, John Hancock
Advisers, Inc.
- --------------------------------------------------------------------------------
10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*
N/A
- --------------------------------------------------------------------------------
11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
See line 9, above.
- --------------------------------------------------------------------------------
12 TYPE OF REPORTING PERSON*
HC
- --------------------------------------------------------------------------------
*SEE INSTRUCTIONS BEFORE FILLING OUT!
PAGE 4 OF 12 PAGES
<PAGE>
CUSIP NO. 202795746 13G PAGE 5 OF 12 PAGES
- --------------------------------------------------------------------------------
1 NAME OF REPORTING PERSON
S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
John Hancock Advisers, Inc.
I.R.S. No. 04-2441573
- --------------------------------------------------------------------------------
2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) [_]
(b) [_]
N/A
- --------------------------------------------------------------------------------
3 SEC USE ONLY
- --------------------------------------------------------------------------------
4 CITIZENSHIP OR PLACE OF ORGANIZATION
Delaware
- --------------------------------------------------------------------------------
5 SOLE VOTING POWER
Number of
Shares 30,000
------------------------------------------------------------------
Beneficially 6 SHARED VOTING POWER
Owned by
Each -0-
------------------------------------------------------------------
Reporting 7 SOLE DISPOSITIVE POWER
Person
With 30,000
------------------------------------------------------------------
8 SHARED DISPOSITIVE POWER
-0-
- --------------------------------------------------------------------------------
9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
30,000
- --------------------------------------------------------------------------------
10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*
N/A
- --------------------------------------------------------------------------------
11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
4.3%
- --------------------------------------------------------------------------------
12 TYPE OF REPORTING PERSON*
IA
- --------------------------------------------------------------------------------
*SEE INSTRUCTIONS BEFORE FILLING OUT!
PAGE 5 OF 12 PAGES
<PAGE>
INSTRUCTIONS FOR SCHEDULE 13G
INSTRUCTIONS FOR COVER PAGE
(1) Names and Social Security Numbers of Reporting Persons - Furnish the full
legal name of each person for whom the report is filed - i.e., each
person required to sign the schedule itself - including each member of a
group. Do not include the name of a person required to be identified in
the report but who is not a reporting person. Reporting persons are also
requested to furnish their Social Security or I.R.S. identification
numbers, although disclosure of such numbers is voluntary, not mandatory
(see "SPECIAL INSTRUCTIONS FOR COMPLYING WITH SCHEDULE 13G," below).
(2) If any of the shares beneficially owned by a reporting person are held as a
member of a group and such membership is expressly affirmed, please check
row 2(a). If the membership in a group is disclaimed or the reporting
person describes a relationship with other persons but does not affirm
the existence of a group, please check row 2(b) [unless a joint filing
pursuant to Rule 13d-1(e)(1) in which case it may not be necessary to
check row 2(b)].
(3) The third row is for SEC internal use; please leave blank.
(4) Citizenship or Place of Organization - Furnish citizenship if the named
reporting person is a natural person. Otherwise, furnish place of
organization.
(5)-(9), (11) Aggregate Amount Beneficially Owned By Each Reporting Person,
Etc. - Rows (5) through (9) inclusive, and (11) are to be completed in
accordance with the provisions of Item 4 of Schedule 13G. All percentages
are to be rounded off to the nearest tenth (one place after decimal
point).
(10) Check if the aggregate amount reported as beneficially owned in row (9)
does not include shares as to which beneficial ownership is disclaimed
pursuant to Rule 13d-4 [17 CFR 240.13d-4] under the Securities Exchange Act
of 1934.
(12) Type of Reporting Person - Please classify each "reporting person"
according to the following breakdown (see Item 3 of Schedule 13G) and place
the appropriate symbol on the form:
<TABLE>
<CAPTION>
Category Symbol
<S> <C>
Broker Dealer BD
Bank BK
Insurance Company IC
Investment Company IV
Investment Adviser IA
Employee Benefit Plan, Pension Fund,
or Endowment Fund EP
Parent Holding Company HC
Corporation CO
Partnership PN
Individual IN
Other OO
</TABLE>
Notes:
Attach as many copies of the second part of the cover page as are needed, one
reporting person per page.
Filing persons may, in order to avoid unnecessary duplication, answer items on
the schedules (Schedule 13D, 13G or 14D-1) by appropriate cross references to an
item or items on the cover page(s). This approach may only be used where the
cover page item or items provide all the disclosure required by the schedule
item. Moreover, such a use of a cover page item will result in the item
becoming a part of the schedule and accordingly being considered as "filed" for
purposes of Section 18 of the Securities Exchange Act or otherwise subject to
the liabilities of that section of the Act.
Reporting persons may comply with their cover page filing requirements by
filing either completed copies of the blank forms available from the Commission,
printed or typed facsimiles, or computer printed facsimiles, provided the
documents filed have identical formats to the forms prescribed in the
Commission's regulations and meet existing Securities Exchange Act rules as to
such matters as clarity and size (Securities Exchange Act Rule 12b-12).
SPECIAL INSTRUCTIONS FOR COMPLYING WITH SCHEDULE 13G
Under Sections 13(d), 13(g) and 23 of the Securities Exchange Act of 1934 and
the rules and regulations thereunder, the Commission is authorized to solicit
the information required to be supplied by this schedule by certain security
holders of certain issuers.
Disclosure of the information specified in this schedule is mandatory, except
for Social Security or I.R.S. identification numbers, disclosure of which is
voluntary. The information will be used for the primary purpose of determining
and disclosing the holdings of certain beneficial owners of certain equity
securities. This statement will be made a matter of public record. Therefore,
any information given will be available for inspection by any member of the
public.
page 6 of 12 pages
<PAGE>
Because of the public nature of the information, the Commission can utilize it
for a variety of purposes, including referral to other governmental authorities
or securities self-regulatory organizations for investigatory purposes or in
connection with litigation involving the Federal securities laws or other civil,
criminal or regulatory statutes or provisions, Social Security or I.R.S.
identification numbers, if furnished, will assist the Commission in identifying
security holders and, therefore, in promptly processing statements of beneficial
ownership of securities.
Failure to disclose the information requested by this schedule, except for
Social Security or I.R.S. identification numbers, may result in civil or
criminal action against the persons involved for violation of the Federal
securities laws and rules promulgated thereunder.
GENERAL INSTRUCTIONS
A. Statements containing the information required by this schedule shall be
filed not later than February 14 following the calendar year covered by the
statement or within the time specified in Rule 13d-1(b)(2), if applicable.
B. Information contained in a form which is required to be filed by rules under
section 13(f) (15 U.S.C. 78m(f)) for the same calendar year as that covered
by a statement on this schedule may be incorporated by reference in
response to any of the items of this schedule. If such information is
incorporated by reference in this schedule, copies of the relevant pages of
such form shall be filed as an exhibit to this schedule.
C. The item numbers and captions of the items shall be included but the text of
the items is to be omitted. The answers to the items shall be so prepared as
to indicate clearly the coverage of the items without referring to the text
of the items. Answer every item. If an item is inapplicable or the answer
is in the negative, so state.
ITEM 1.
(a) Name of Issuer
(b) Address of Issuer's Principal Executive Offices
ITEM 2.
(a) Name of Person Filing
(b) Address of Principal Business Office or, if none, Residence
(c) Citizenship
(d) Title of Class of Securities
(e) CUSIP Number
ITEM 3. IF THIS STATEMENT IS FILED PURSUANT TO RULE 13D-1(B), OR 13D-2(B),
CHECK WHETHER THE PERSON FILING IS A:
(a) [_]Broker or Dealer registered under Section 15 of the Act
(b) [_]Bank as defined in section 3(a)(6) of the Act.
(c) [_]Insurance Company as defined in section 3(a)(19) of the act
(d) [_]Investment Company registered under section 8 of the Investment Company
Act
(e) [_]Investment Adviser registered under section 203 of the Investment
Advisers Act of 1940
(f) [_]Employee Benefit Plan, Pension Fund which is subject to the provisions
of the Employee Retirement Income Security Act of 1974 or Endowment Fund;
see (S)240.13d-1(b)(1)(ii)(F)
(g) [_]Parent Holding Company, in accordance with (S)240.13d-1(b)(ii)(G)
(Note: See Item 7)
(h) [_]Group, in accordance with (S)240.13d-1(b)(1)(ii)(H)
ITEM 4. OWNERSHIP
If the percent of the class owned, as of December 31 of the year covered by
the statement, or as of the last day of any month described in Rule 13d-1(b)(2),
if applicable, exceeds five percent, provide the following information as of
that date and identify those shares which there is a right to acquire.
(a) Amount Beneficially Owned
(b) Percent of Class
Page 7 of 12 pages
<PAGE>
(c) Number of shares as to which such person has:
(i) sole power to vote or to direct the vote
(ii) shared power to vote or to direct the vote
(iii) sole power to dispose or to direct the disposition of
(iv) shared power to dispose or to direct the disposition of
Instruction: For computations regarding securities which represent a right to
acquire an underlying security see Rule 13d-3(d)(1).
ITEM 5. OWNERSHIP OF FIVE PERCENT OR LESS OF A CLASS
If this statement is being filed to report the fact that as of the date
hereof the reporting person has ceased to be the beneficial owner of more than
five percent of the class of securities, check the following [_].
Instruction: Dissolution of a group requires a response to this item.
ITEM 6. OWNERSHIP OF MORE THAN FIVE PERCENT ON BEHALF OF ANOTHER PERSON
If any other person is known to have the right to receive or the power to
direct the receipt of dividends from, or the proceeds from the sale of, such
securities, a statement to that effect should be included in response to this
item and, if such interest relates to more than five percent of the class, such
person should be identified. A listing of the shareholders of an investment
company registered under the Investment Company Act of 1940 or the beneficiaries
of employee benefit plan, pension fund or endowment fund is not required.
ITEM 7. IDENTIFICATION AND CLASSIFICATION OF THE SUBSIDIARY WHICH ACQUIRED THE
SECURITY BEING REPORTED ON BY THE PARENT HOLDING COMPANY
If a parent holding company has filed this schedule, pursuant to Rule 13d-
1(b)(ii)(G), so indicate under Item 3(g) and attach an exhibit stating the
identity and the Item 3 classification of the relevant subsidiary. If a parent
holding company has filed this schedule pursuant to Rule 13d-1(c), attach an
exhibit stating the identification of the relevant subsidiary.
ITEM 8. IDENTIFICATION AND CLASSIFICATION OF MEMBERS OF THE GROUP
If a group has filed this schedule pursuant to Rule 13D-1(b)(ii)(H), so
indicate under Item 3(h) and attach an exhibit stating the identity and Item 3
classification of each member of the group. If a group has filed this schedule
pursuant to Rule 13d-1(c), attach an exhibit stating the identity of each member
of the group.
ITEM 9. NOTICE OF DISSOLUTION OF GROUP
Notice of dissolution of a group may be furnished as an exhibit stating the
date of the dissolution and that all further filings with respect to
transactions in the security reported on will be filed, if required, by members
of the group, in their individual capacity. See Item 5.
ITEM 10. CERTIFICATION
The following certification shall be included if the statement is filed
pursuant to Rule 13d-1(b):
By signing below I certify that, to the best of my knowledge and belief, the
securities referred to above were acquired in the ordinary course of business
and were not acquired for the purpose of and do not have the effect of changing
or influencing the control of the issuer of such securities and were not
acquired in connection with or as a participant in any transaction having such
purposes or effect.
SIGNATURE
After reasonable inquiry and to the best of my knowledge and belief, I certify
that the information set forth in this statement is true, complete and correct.
_____________________________________
Date
_____________________________________
Signature
_____________________________________
Name/Title
Page 8 of 12 pages
<PAGE>
The original statement shall be signed by each person on whose behalf the
statement is filed or his authorized representative. If the statement is signed
on behalf of a person by his authorized representative other than an executive
officer or general partner of the filing person, evidence of the
representative's authority to sign on behalf of such person shall be filed with
the statement, provided, however, that a power of attorney for this purpose
which is already on file with the Commission may be incorporated by reference.
The name and any title of each person who signs the statement shall be typed or
printed beneath his signature.
Note: Six copies of this statement, including all exhibits, should be filed
with the Commission.
ATTENTION: INTENTIONAL MISSTATEMENTS OR OMISSIONS OF FACT CONSTITUTE
FEDERAL CRIMINAL VIOLATIONS (SEE 18 U.S.C. 1001)
Item 1(a) Name of Issuer:
--------------
Commonwealth Edison Company
Item 1(b) Address of Issuer's Principal Executive Offices:
-----------------------------------------------
1 First National Plaza, 37th Floor
Chicago, Illinois 60603
Item 2(a) Name of Person Filing:
---------------------
This terminating Amendment No. 2 Schedule 13G filing is made
on behalf of John Hancock Mutual Life Insurance Company
("JHMLICO"), JHMLICO's wholly-owned subsidiary, John Hancock
Subsidiaries, Inc. ("JHSI"), JHSI's wholly-owned subsidiary,
The Berkeley Financial Group ("TBFG") and TBFG's wholly-owned
subsidiary, John Hancock Advisers, Inc. ("JHA").
Item 2(b) Address of the Principal Offices:
--------------------------------
The principal business offices of JHMLICO and JHSI are located
at John Hancock Place, P.O. Box 111, Boston, MA 02117. The
principal business offices of TBFG and JHA are located at 101
Huntington Avenue, Boston, MA 02199.
Item 2(c) Citizenship:
-----------
JHMLICO and TBFG were organized and exist under the laws of
the Commonwealth of Massachusetts. JHSI and JHA were organized
and exist under the laws of the State of Delaware.
Item 2(d) Title of Class of Securities:
----------------------------
$6.875 Cumulative Preference Stock without Par Value.
Item 2(e) CUSIP Number:
------------
202795746
Item 3 If the Statement is being filed pursuant to Rule 13d-1(b), or
-------------------------------------------------------------
13d-2(b), check whether the person filing is a:
----------------------------------------------
JHMLICO: (a) (X) Broker or Dealer registered under (S)15 of
the Act.
(c) (X) Insurance Company as defined in (S)3(a)(19)
of the Act.
(e) (X) Investment Adviser registered under (S)203
of the Investment Advisers Act of 1940.
(g) (X) Parent Holding Company, in accordance with
(S)240.13d-1(b)(ii)(G).
PAGE 9 OF 12 PAGES
<PAGE>
JHSI: (g) (X) Parent Holding Company, in accordance with
(S)240.13d-1(b)(ii)(G).
TBFG: (g) (X) Parent Holding Company, in accordance with
(S)240.13d-1(b)(ii)(G).
JHA: (e) (X) Investment Adviser registered under (S)203
of the Investment Advisers Act of 1940.
Item 4 Ownership:
---------
(a) Amount Beneficially Owned:
-------------------------
JHA has direct beneficial ownership of 30,000 shares of
$6.875 Cumulative Preference Stock without Par Value.
Through their subsidiary relationship to JHA, JHMLICO,
JHSI and TBFG have indirect beneficial ownership of
these same shares. The shares are held by Patriot
Select Divident Trust, a closed-end diversified
management company registered under (S)8 of the
Investment Company Act.
(b) Percent of Class: 4.3%
----------------
(c) (i) sole power to vote or to direct the vote:
JHA has sole power to vote or to direct the
vote of the 30,000 shares of the cumulative
preference stock under the an advisory
agreement with Patriot Select Divident Trust
dated 5/6/92.
(ii) shared power to vote or to direct the vote: -0-
(iii) sole power to dispose or to direct the
disposition of: JHA has sole power to dispose
or to direct the disposition of 30,000 shares
of the cumulative preference stock under the
advisory agreement noted in Item 4(c)(i)
above.
(iv) shared power to dispose or to direct the
disposition of: -0-
Item 5 Ownership of Five Percent or Less of a Class:
--------------------------------------------
This Statement is being filed to report that as of the
February month end computations, the reporting persons have
ceased to be the beneficial owners of more than five percent
of the Class of securities noted in Item 2(d).
Item 6 Ownership of More than Five Percent on Behalf of Another Person:
---------------------------------------------------------------
N/A
PAGE 10 OF 12 PAGES
<PAGE>
Item 7 Identification and Classification of the Subsidiary which
---------------------------------------------------------
Acquired the Security Being Reported on by the Parent Holding
-------------------------------------------------------------
Company:
-------
Not applicable.
Item 8 Identification and Classification of Members of the Group:
---------------------------------------------------------
Not applicable.
Item 9 Notice of Dissolution of a Group:
--------------------------------
Not applicable.
Item 10 Certification:
-------------
By signing below the undersigned certifies that, to the best
of its knowledge and belief, the securities referred to above
were acquired in the ordinary course of business and were not
acquired for the purpose of and do not have the effect of
changing or influencing the control of the issuer of such
securities and were not acquired in connection with or as a
participant in any transaction having such purpose or effect.
SIGNATURE
After reasonable inquiry and to the best of its knowledge and belief, each
of the undersigned certifies that the information set forth in this statement is
true, complete and correct.
JOHN HANCOCK MUTUAL LIFE INSURANCE COMPANY
By: John T. Farady
-----------------------------------
Name: /s/ John T. Farady
----------------------------------
Dated: March 9, 1994 Title: Vice President & Treasurer
------------------- ---------------------------------
JOHN HANCOCK SUBSIDIARIES, INC.
By: John T. Farady
-----------------------------------
Name: /s/ John T. Farady
----------------------------------
Dated: March 9, 1994 Title: Vice President & Treasurer
------------------- ---------------------------------
THE BERKELEY FINANCIAL GROUP
By: /s/ Susan S. Newton
-----------------------------------
Name: Susan S. Newton
----------------------------------
Dated: March 9, 1994 Title: Vice President
------------------- ---------------------------------
JOHN HANCOCK ADVISERS, INC.
By: /s/ Susan S. Newton
-----------------------------------
Name: Susan S. Newton
----------------------------------
Dated: March 9, 1994 Title: Vice President
------------------- ---------------------------------
PAGE 11 OF 12 PAGES
<PAGE>
EXHIBIT A
JOINT FILING AGREEMENT
----------------------
John Hancock Mutual Life Insurance Company, John Hancock Subsidiaries,
Inc., The Berkeley Financial Group and John Hancock Advisers, Inc. agree that
the terminating Schedule 13G, Amendment 2 to which this Agreement is attached,
relating to the $6.875 Cumulative Preference Stock without Par Value of
Commonwealth Edison Company, is filed on behalf of each of them.
JOHN HANCOCK MUTUAL LIFE INSURANCE COMPANY
By: John T. Farady
-----------------------------------
Name: /s/ John T. Farady
----------------------------------
Dated: March 9, 1994 Title: Vice President & Treasurer
------------------- ---------------------------------
JOHN HANCOCK SUBSIDIARIES, INC.
By: John T. Farady
-----------------------------------
Name: /s/ John T. Farady
----------------------------------
Dated: March 9, 1994 Title: Vice President & Treasurer
------------------- ---------------------------------
THE BERKELEY FINANCIAL GROUP
By: /s/ Susan S. Newton
-----------------------------------
Name: Susan S. Newton
----------------------------------
Dated: March 9, 1994 Title: Vice President
------------------- ---------------------------------
JOHN HANCOCK ADVISERS, INC.
By: /s/ Susan S. Newton
-----------------------------------
Name: Susan S. Newton
----------------------------------
Dated: March 9, 1994 Title: Vice President
------------------- ---------------------------------
PAGE 12 OF 12 PAGES
