To the Senate of the United States:

I transmit to the Senate, for its consideration with a view to ratification, a convention between the United States and the Mexican Republic for the protection of a transit way across the Isthmus of Tehuantepec, signed in the City of Mexico on the 25th ultimo.

Accompanying the treaty is a letter from Mr. P. A. Hargous, the present proprietor and holder of the privileges granted by Mexico, signifying his assent to and acceptance of the terms of its provisions. There is also an abstract of title to him from the original grantee and copies of the several powers and conveyances by which that title is derived to him. It may be well that these papers should be returned to be deposited among the archives of the Department of State.

The additional article of the treaty makes an unnecessary reference to the eleventh, twelfth, and thirteenth articles of the treaty of the 22d of June last, because the eleventh, twelfth, and thirteenth articles of the present treaty contain exactly the same provisions as those contained in the same articles of that treaty, as will appear from the copy of the treaty of the 22d of June last, herewith communicated.

MILLARD FILLMORE.