A treaty was signed on the 16th day of November, 1857, by the Secretary of State and minister of Nicaragua, under the stipulations of which the use and protection of the transit route would have been secured, not only to the United States, but equally to all other nations. How and on what pretext this treaty has failed to receive the ratification of the Nicaraguan Government will appear by the papers herewith communicated from the State Department. The principal objection seems to have been to the provision authorizing the United States to employ force to keep the route open in case Nicaragua should fail to perform her duty in this respect. From the feebleness of that Republic, its frequent changes of government, and its constant internal dissensions, this had become a most important stipulation, and one essentially necessary, not only for the security of the route, but for the safety of American citizens passing and repassing to and from our Pacific possessions. Were such a stipulation embraced in a treaty between the United States and Nicaragua, the knowledge of this fact would of itself most probably prevent hostile parties from committing aggressions on the route, and render our actual interference for its protection unnecessary. The executive government of this country in its intercourse with foreign nations is limited to the employment of diplomacy alone. When this fails it can proceed no further. It can not legitimately resort to force without the direct authority of Congress, except in resisting and repelling hostile attacks. It would have no authority to enter the territories of Nicaragua even to prevent the destruction of the transit and protect the lives and property of our own citizens on their passage. It is true that on a sudden emergency of this character the President would direct any armed force in the vicinity to march to their relief, but in doing this he would act upon his own responsibility. Under these circumstances I earnestly recommend to Congress the passage of an act authorizing the president, under such restrictions as they may deem proper, to employ the land and naval forces of the United States in preventing the transit from being obstructed or closed by lawless violence, and in protecting the lives and property of American citizens traveling thereupon, requiring at the same time that these forces shall be withdrawn the moment the danger shall have passed away. Without such a provision our citizens will be constantly exposed to interruption in their progress and to lawless violence. A similar necessity exists for the passage of such an act for the protection of the Panama and Tehuantepec routes. In reference to the Panama route, the United States, by their existing treaty with New Granada, expressly guarantee the neutrality of the Isthmus, "with the view that the free transit from the one to the other sea may not be interrupted or embarrassed in any future time while this treaty exists."