an extraordinary occasion requires the Senate of the United States to convene for the transaction of business at the Capitol, in the city of Washington, on the 15th day of this month, at 12 o'clock at noon of that day

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.

I transmit herewith a report from the Secretaries of State and Navy, with the accompanying papers, in compliance with the resolution of the Senate of the 11th of March, 1858.

I transmit a report from the Secretary of State, with accompanying papers, in answer to the resolution of the Senate of the 22d instant, requesting information in regard to the seizure of the American vessel Panchita on the coast of Africa.

I transmit herewith, in compliance with the resolution of the Senate of the 19th of May, a communication from the Secretary of the Navy with copies of the correspondence, etc., as afforded by the files of the Department.

In answer to the resolution of the Senate of the 14th instant, requesting information concerning the recent search or seizure of American vessels by foreign armed cruisers in the Gulf of Mexico, I transmit reports from the Secretaries of State and of the Navy.

In reply to the resolutions of the Senate of the United States of the 20th February and 14th March, 1857, I herewith transmit, to be laid before that body, copies of all correspondence, vouchers, and other papers having reference to the accounts of Edward F. Beale, esq., late superintendent of Indian affairs in California, which are of file or record in the Departments of the Treasury and Interior.

I transmit to the Senate a report, dated 13th instant, with the accompanying papers, received from the Secretary of State in answer to the resolution of the Senate of the 5th instant, requesting information in regard to measures which may have been adopted for the protection of American commerce in the ports of Mexico.

I transmit herewith, for the constitutional action of the Senate, a treaty negotiated on the 19th of April, 1858, with the Yancton tribe of Sioux or Dacotah Indians, with accompanying papers from the Department of the Interior.

In compliance with the resolution of the Senate of the 24th ultimo, I herewith transmit a report of the Secretary of State, with accompanying documents.

I transmit herewith, for the constitutional action of the Senate, a treaty negotiated with the Ponca tribe of Indians on the 12th of March, 1858, with the accompanying documents from the Department of the Interior.

I herewith transmit the reports of the Secretary of State and the Secretary of the Navy, with accompanying papers, in answer to the resolution of the Senate of the 19th of January last.

I transmit a report from the Secretary of State, with accompanying papers, in answer to the resolution of the Senate of the 5th instant.

In answer to the resolution of the Senate of the 17th January last, requesting information in regard to the fisheries on the coasts of the British North American Provinces, I transmit a report from the Secretary of State and the documents which accompanied it.

In compliance with the resolution of the Senate of the 10th instant, requesting certain correspondence relative to Central America, I transmit a report from the Secretary of State and the documents by which it was accompanied.

In answer to the resolution of the Senate of the 30th ultimo, requesting information in regard to the establishment of a new British colony in Central America, I transmit a report from the Secretary of State and the documents by which it was accompanied.

I transmit to the Senate, for its consideration with a view to ratification, an additional article, signed in this city on the 16th ultimo, to the convention for the mutual delivery of criminals fugitives from justice in certain cases between the United States on the one part and Prussia and other States of the Germanic Confederation on the other part, concluded on the 15th of June, 1852.

This report is accompanied by a copy of the orders of the Navy Department to Commodore McCauley, requested by the resolution of the Senate of the 9th instant.