[EXHIBIT 4d TO COLONIAL GAS COMPANY FORM 10-K FOR YEAR ENDED DECEMBER 31, 1995] THIS AMENDMENT TO SECOND SUPPLEMENTAL INDENTURE, dated as of August 1, 1995 (hereinafter referred to as this "Amendment" or this "Instrument"), made and entered into by and between Colonial Gas Company, a corporation duly organized and existing under the laws of The Commonwealth of Massachusetts, having its principal place of business at 40 Market Street, Lowell, Massachusetts (hereinafter referred to as the "Company"), and The First National Bank of Boston, a corporation duly organized and existing under the laws of The Commonwealth of Massachusetts, having its principal place of business at 100 Federal Street, Boston, Massachusetts, as successor Trustee (hereinafter referred to, together with its successors hereunder, as the "Trustee") under the Second Amended and restated First Mortgage Indenture dated as of June 15, 1992, as supplemented by the First Supplemental Indenture dated as of June 15, 1992 and the Second Supplemental Indenture (the "Second Supplement") dated as of August 1, 1995 (as amended and so supplemented, the "Indenture"). WHEREAS, the Company has heretofore duly executed and delivered to the Trustee the Second Supplement, to issue up to $75,000,000 in aggregate principal amount of First Mortgage Bonds designated Secured Medium Term Notes, Series A (herein referred to as the "Series A Notes") under the Indenture, which Series A Notes are to be further designated and described, as to dates, maturities, interest rates, sinking funds, denominations and redemption and call provisions, in such Series A Notes which the Company may issue from time to time, each in the form hereinafter set forth (and the Trustee hereby confirms its approval, previously given prior to the certification of any of said additional Series A Notes, of the form and designation thereof so specified); and WHEREAS, the Company desires to amend the Second Supplemental to confirm its ability to fix interest payment dates as it may determine; NOW, THEREFORE, THIS INSTRUMENT (BEING THE AMENDMENT TO SECOND SUPPLEMENT TO THE INDENTURE) WITNESSETH that, in consideration of the premises, and of the acceptance and purchase of the Series A Notes by the holders thereof, and of the sum of $1.00 duly paid by the Trustee to the Company, and of other good and valuable consideration, the receipt of which is hereby acknowledged, and in confirmation of and supplementing and amending the Indenture and in performance of and compliance with the provisions thereof, the Company and the Trustee agree as follows: ARTICLE I Series A Notes Section 1.01. Amendment of the Second Supplement. The Second Supplement is hereby amended as follows: (a) The first paragraph of the Form of the Series A Note in the last recital is amended by deleting the words "February 15 and August 15" and replacing them with "April 14 & October 14." (b) The first paragraph of Section 1.01 is hereby amended by adding the phrase, "or such other dates as set forth in the form of such Notes," after the phrase "February 15 and August 15 in each year." IN WITNESS WHEREOF, Colonial Gas Company has caused this Amendment to be executed, and its corporate seal to be hereto affixed, by its officers thereunto duly authorized, and The First National Bank of Boston has caused this Amendment to be executed, and its corporate seal to be hereto affixed, by its officers thereunto duly authorized, all as of the day and year first above written but actually on the 12th day of October, 1995. COLONIAL GAS COMPANY [SEAL] By Dennis W. Carroll Vice President BY Dennis W. Carroll Treasurer Attest: Timothy A. Clark Assistant Clerk THE FIRST NATIONAL BANK OF BOSTON, as Trustee [SEAL] By Terence A. McGiunnis Authorized Officer Attest: Michael R. Garfield Assistant Secretary Commonwealth of Massachusetts ) ) ss.: County of Middlesex ) On this 12th day of October, 1995 before me personally appeared Dennis W. Carroll and Timothy A. Clark, to me personally known, who, being by me duly sworn, did say that they are the Vice President and Treasurer and the Assistant Clerk, respectively, of Colonial Gas Company, that the seal affixed to the foregoing instrument is the corporate seal of said corporation, and that said instrument was signed and sealed by them on behalf of said corporation by authority of its Board of Directors; and the said Dennis W. Carroll and Timothy A. Clark, acknowledged said instrument to be the free act and deed of said corporation. [Seal] June T. Abreu Notary Public My Commission Expires: 2/19/99 Commonwealth of Massachusetts ) ) ss.: County of Middlesex ) On this 23rd day of October, 1995 before me personally appeared Terence A. McGiunnis, to me personally known, who, being by me duly sworn, did say that he is an Authorized Officer of The First National Bank of Boston, that the seal affixed to the foregoing instrument is the corporate seal of said bank, and that said instrument was signed and sealed by him on behalf of said bank, by authority of its Board of Directors; and the said Terence A. McGiunnis acknowledged said instrument to be the free act and deed of said company, as trustee. [Seal] Michael R. Garfield Notary Public My Commission Expires: January 31, 1997 COLONIAL GAS COMPANY Amendment to Second Supplemental Indenture Dated as of August 1, 1995 to Second Amended and Restated First Mortgage Indenture The above Amendment to Second Supplemental Indenture was filed for recordation in Massachusetts as follows: Location Date Reference Secretary of the 10/26/95 Document Nos. Commonwealth 374252 and 347251 Barnstable County 10/27/95 Instrument No.54662 Book 9903 Page 289 Barnstable County, Land 10/27/95 Document No. 650917 Registration Certificates of Title Division			 Nos. 46050 (131302) 59716 (178392), and 84810 (278220) Middlesex County, 10/30/95 Instrument No.49470 North Division Book ______, Page______ Middlesex County, 10/26/95 Instrument No. 699 South Division Book ______, Page ______ Plymouth 11/3/95 Instrument No.96562 Book 13940, Page 16 [EXHIBIT 4d TO COLONIAL GAS COMPANY FORM 10-K FOR YEAR ENDED DECEMBER 31, 1995]