I transmit to the Senate, for its consideration with a view to ratification, a convention concluded on the 21st instant between the United States and His Majesty the King of Sweden and Norway for the mutual surrender of fugitive criminals.

JAMES BUCHANAN.

WASHINGTON, March 29, 1860.

To the Senate of the United States:

In compliance with the resolution of the Senate of the 21st of March, 1860, requesting the President of the United States "to inform the Senate, if in his opinion it be not incompatible with the public interest, if any instructions have been given to any of the officers of the Navy of the United States by which, in any event, the naval force of the United States or any part thereof were to take part in the civil war now existing in Mexico, and if the recent capture of two war steamers of Mexico by the naval force of the United States was done in pursuance of orders issued by this Government, and also by what authority those steamers have been taken in possession by the naval force of the United States and the men on board made prisoners," I transmit the inclosed report, with accompanying papers, from the Secretary of the Navy.

JAMES BUCHANAN.

WASHINGTON, March 29, 1860.

To the House of Representatives:

I transmit herewith a report of the Secretary of War, with its accompaniments, communicating the information called for by the resolution of the House of Representatives of the 1st instant, concerning the difficulties on the southwestern frontier.

JAMES BUCHANAN.