The Government of the United States can never permit these routes to be permanently interrupted, nor can it safely allow them to pass under the control of other rival nations. While it seeks no exclusive privileges upon them for itself, it can never consent to be made tributary to their use to any European power. It is worthy of consideration, however, whether to some extent it would not necessarily become so if after Great Britain and France have adopted our policy and made treaties with the Isthmian Governments in pursuance of it we should ourselves reconsider it and refuse to pursue it in the treaties of the United States. I might add that the opening of these transit routes can not fail to extend the trade and commerce of the United States with the countries through which they pass; to afford an outlet and a market for our manufactures within their territories; to encourage American citizens to develop their vast stores of mining and mineral wealth for our benefit, and to introduce among them a wholesome American influence calculated to prevent revolutions and to render their governments stable. JAMES BUCHANAN. WASHINGTON, _April 10, 1860_. _To the House of Representatives_: I communicate herewith a report from the Secretary of State, in reply to the resolution of the House of Representatives of the 6th instant, respecting the expulsion of American citizens from Mexico and the confiscation of their property by General Miramon. JAMES BUCHANAN. WASHINGTON, _April 10, 1860_. _To the House of Representatives_: In compliance with the resolution of the House of Representatives of the 23d of December, 1858, requesting information in regard to the duties on tobacco in foreign countries, I transmit a report from the Secretary of State and the documents by which it was accompanied. JAMES BUCHANAN. WASHINGTON, D.C., _April 11, 1860_. _To the House of Representatives of the United States_: In compliance with the resolution of the House of Representatives of March 26, 1860, requesting me "to transmit to the House all information in the possession of the officer in charge of the Coast Survey showing the practicability of making Harlem River navigable for commercial purposes, and the expenses thereof," I herewith transmit a report from the Secretary of the Treasury containing the desired information. JAMES BUCHANAN. WASHINGTON, _April 11, 1860_. _To the Senate of the United States_: In compliance with the resolution of the Senate of the 2d February, 1859, requesting information in regard to the compulsory enlistment of citizens of the United States in the army of Prussia, I transmit a report from the Secretary of State and the documents by which it was accompanied. JAMES BUCHANAN. WASHINGTON, _April 12, 1860_. _To the Senate of the United States_: