The routes across the Isthmus at Tehuantepec and Panama are also worthy of our serious consideration.. They did not fail to engage the attention of my predecessor. The negotiator of the treaty of Guadalupe Hidalgo was instructed to offer a very large sum of money for the right of transit across the Isthmus of Tehuantepec. The Mexican Government did not accede to the proposition for the purchase of the right of way, probably because it had already contracted with private individuals for the construction of a passage from the Guasacualco River to Tehuantepec. I shall not renew any proposition to purchase for money a right which ought to be equally secured to all nations on payment of a reasonable toll to the owners of the improvement, who would doubtless be well contented with that compensation and the guaranties of the maritime states of the world in separate treaties negotiated with Mexico, binding her and them to protect those who should construct the work. 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. It is our policy to encourage every practicable route across the isthmus which connects North and South America, either by railroad or canal, which the energy and enterprise of our citizens may induce them to complete, and I consider it obligatory upon me to adopt that policy, especially in consequence of the absolute necessity of facilitating intercourse with our possessions on the Pacific.