CANADIAN PACIFIC RAILWAY LIMITED as Guarantor and CANADIAN PACIFIC RAILWAY COMPANY as Issuer and THE BANK OF NEW YORK MELLON as Trustee FOURTH SUPPLEMENTAL INDENTURE

As used herein “Fourth Supplemental Indenture”, “hereto”, “herein”, “hereof”, “hereby”, “hereunder” and similar expressions refer to this Fourth Supplemental Indenture and not to any particular Article, Section or other portion hereof and include any and every instrument supplemental or ancillary hereto or in implementation hereof.

All terms contained in this Fourth Supplemental Indenture which are defined in the Original Indenture and not defined herein shall, for all purposes hereof, have the meanings given to such terms in the Original Indenture, unless the context otherwise specifies or requires.

The division of this Fourth Supplemental Indenture into Articles and Sections, the provision of the table of contents hereto and the insertion of headings are for convenience of reference only and shall not affect the construction or interpretation of this Fourth Supplemental Indenture.

The Guarantor hereby fully and unconditionally guarantees to each Holder of Debentures, the due and punctual payment of the principal of, premium, if any, and interest on the Debentures, the due and punctual payment of any sinking fund or analogous payments that may be payable with respect to such Debentures and the due and punctual payment of any Additional Amounts that may be payable with respect to such Debentures, when and as the same shall become due and payable, whether on the Stated Maturity, by declaration of acceleration, call for redemption or otherwise, according to the terms hereof and of the Original Indenture, as supplemented by the supplemental indentures heretofore executed by the Issuer and the Trustee. In case of the failure of the Issuer punctually to make any such payment of principal, premium, if any, or interest, or any such sinking fund or analogous payment that may be payable with respect to the Debentures or any Additional Amounts that may be payable with respect to the Debentures, the Guarantor hereby agrees to cause any such payment to be made punctually when and as the same shall become due and payable, whether on the Stated Maturity or by declaration of acceleration, call for redemption or otherwise, and as if such payment were made by the Issuer.

The Guarantor hereby agrees that its obligations hereunder shall be as if it were principal debtor and not merely surety, and shall be absolute and unconditional, irrespective of, and shall be unaffected by, any invalidity, irregularity or unenforceability of the Debentures, the Original Indenture or this Fourth Supplemental Indenture, any failure to enforce the provisions of the Debentures, the Original Indenture or this Fourth Supplemental Indenture, or any waiver, modification or indulgence granted to the Issuer with respect thereto or hereto, by the Holder of the Debentures or the Trustee or any other circumstance which may otherwise constitute a legal or equitable discharge of a surety or guarantor; provided, however, that, notwithstanding the foregoing, no such waiver, modification or indulgence shall, without the consent of the Guarantor, increase

the principal amount of the Debentures, or increase the interest rate thereon, or increase any premium payable upon redemption thereof, or alter the Stated Maturity thereof. The Guarantor hereby waives diligence, presentment, demand of payment, filing of claims with a court in the event of merger or bankruptcy of the Issuer, any right to require a proceeding first against the Issuer, protest or notice with respect to the Debentures or the indebtedness evidenced thereby, or with respect to any sinking fund or analogous payment that may be payable with respect to the Debentures or with respect to any Additional Amounts that may be payable with respect to the Debentures and all demands whatsoever, and covenants that its obligations under this Section 2.1 will not be discharged except by payment in full of the principal of, premium, if any, and interest on and any Additional Amounts that may be payable with respect to the Debentures.

The Guarantor shall be subrogated to all rights of each Holder of the Debentures, the Trustee and any Paying Agent against the Issuer in respect of any amounts paid to such Holder by the Guarantor pursuant to the provisions of this Section 2.1; provided, however, that the Guarantor shall not be entitled to enforce or to receive any payments arising out of or based upon such right of subrogation until the principal of, premium, if any, and interest on all Debentures of the same series issued under the Original Indenture, as supplemented by the supplemental indentures heretofore executed by the Issuer and the Trustee, and any sinking fund or analogous payments and Additional Amounts with respect to such Debentures shall have been paid in full.

Any term or provision of the Original Indenture, as supplemented by the supplemental indentures heretofore executed by the Issuer and the Trustee, and this Fourth Supplemental Indenture to the contrary notwithstanding, the maximum aggregate amount of the Debentures guaranteed hereunder by the Guarantor shall not exceed the maximum amount that can be hereby guaranteed by the Guarantor without rendering the Guarantee, as it relates to the Guarantor, voidable under applicable law relating to fraudulent conveyance, fraudulent transfer, corporate benefit, financial assistance or similar laws affecting the rights of creditors generally.

By executing this Fourth Supplemental Indenture, the Guarantor acknowledges and agrees that the obligations to compensate, reimburse, and indemnify the Trustee under the Original Indenture, including, without limitation, Section 6.03 of the Original Indenture, shall apply to the Guarantor and that the Guarantor and the Issuer, jointly and severally, are obligated to compensate, reimburse, and indemnify the Trustee in accordance with the terms of the Original Indenture, including, without limitation, Section 6.03 of the Original Indenture.

To evidence its Guarantee set forth in Section 2.1 hereof, the Guarantor hereby agrees that this Fourth Supplemental Indenture shall be executed on behalf of the Guarantor by one or more authorized officers or persons holding an equivalent title.

The Guarantor hereby agrees that its Guarantee set forth in Section 2.1 hereof shall remain in full force and effect notwithstanding the absence of the endorsement of any notation of such Guarantee on the Debentures.

The Guarantor will be released and relieved of its obligations under the Guarantee in respect of any series of the Debentures, and such Guarantee will be terminated, upon receipt by the Trustee of a Corporation Order (without the consent of the Trustee) requesting such release, upon (i) satisfaction and discharge of the Original Indenture or (ii) defeasance or covenant defeasance with respect to any series of the Debentures , in each case, under the terms of the Original Indenture. At the request of the Issuer, the Trustee shall execute and deliver an appropriate instrument evidencing such release.

The recitals contained herein, shall be taken as the statements of the Issuer and the Guarantor, and neither the Trustee nor any Authenticating Agent assumes any responsibility for their correctness. The Trustee makes no representations as to the validity or sufficiency of this Fourth Supplemental Indenture except that the Trustee represents that it is duly authorized to execute and deliver this Fourth Supplemental Indenture and to perform its obligations under the Original Indenture and hereunder and that the statements made by it or to be made by it in a Statement of Eligibility and Qualification on Form T-1 supplied to the Issuer are true and accurate as of the date thereof.

The Original Indenture as supplemented by this Fourth Supplemental Indenture is in all respects ratified and confirmed, and this Fourth Supplemental Indenture shall be deemed part of the Original Indenture in the manner and to the extent herein and therein provided.

3.6    Governing Law This Fourth Supplemental Indenture (including the Guarantee provided herein), and the Original Indenture as supplemented hereby shall be governed by and construed in accordance with the laws of the State of New York.

In case any provision in this Fourth Supplemental Indenture (including the Guarantee provided herein) or in the Original Indenture as supplemented hereby shall be invalid, illegal or unenforceable, the validity, legality and enforceability of the remaining provisions shall not in any way be affected or impaired thereby.

The Trustee hereby accepts the trusts in this Fourth Supplemental Indenture declared and provided for and agrees to perform the same upon the terms and conditions herein before set forth in trust for the various Persons who shall from time to time be Holders subject to all the terms and conditions herein set forth.

This Fourth Supplemental Indenture may be executed in any number of counterparts, each of which so executed shall be deemed to be an original, but all such counterparts shall together constitute but one and the same instrument and notwithstanding their date of execution shall be deemed to bear the date first above written.