US Presidency
1849

Such guaranties would do more to secure the completion of the communication through the territory of Mexico than any other reasonable consideration that could be offered; and as Mexico herself would be the greatest gainer by the opening of this communication between the Gulf and the Pacific Ocean, it is presumed that she would not hesitate to yield her aid in the manner proposed to accomplish an improvement so important to her own best interests. We have reason to hope that the proposed railroad across the Isthmus at Panama will be successfully constructed under the protection of the late treaty with New Granada, ratified and exchanged by my predecessor on the 10th day of June, 1848, which guarantees the perfect neutrality of the Isthmus and the rights of sovereignty and property of New Granada over that territory, with a view that the free transit from ocean to ocean may not be interrupted or embarrassed during the existence of the treaty.