WASHINGTON, June 11, 1858.

To the Senate of the United States:

In answer to the resolution of the Senate of the 19th ultimo, respecting the Isthmus of Tehuantepec, I transmit herewith a report from the Secretary of State, with the documents by which it is accompanied, together with the copy of a letter from the Postmaster-General of the 21st ultimo to the Department of State.

JAMES BUCHANAN.

WASHINGTON CITY, June 11, 1858.

To the House of Representatives:

I transmit herewith a report from the Secretary of War, with the accompanying papers,[8] in obedience to the resolution of the House of Representatives of the 2d of June, 1858.

JAMES BUCHANAN.

WASHINGTON CITY, June 12, 1858.

To the Senate and House of Representatives: