An efficient organization of the Army, composed of regulars and volunteers, whilst prosecuting the war in Mexico, it is believed would require the appointment of a general officer to take the command of all our military forces in the field. Upon the conclusion of the war the services of such an officer would no longer be necessary, and should be dispensed with upon the reduction of the Army to a peace establishment. I recommend that provision be made by law for the appointment of such a general officer to serve during the war. It is respectfully recommended that early action should be had by Congress upon the suggestions submitted for their consideration, as necessary to insure active and efficient service in prosecuting the war, before the present favorable season for military operations in the enemy's country shall have passed away. JAMES K. POLK. WASHINGTON, _January 4, 1847_. _To the Senate of the United States_: I communicate herewith a report of the Postmaster-General, which contains the information called for by the resolution of the Senate of the 16th instant, in relation to the means which have been taken for the transmission of letters and papers to and from the officers and soldiers now in the service of the United States in Mexico. In answer to the inquiry whether any legislation is necessary to secure the speedy transmission and delivery of such letters and papers, I refer you to the suggestions of the Postmaster-General, which are recommended to your favorable consideration. JAMES K. POLK. WASHINGTON, _January 11, 1847_. _To the Senate of the United States_: In answer to the resolution of the Senate of the 22d ultimo, calling for information relative to the negotiation of the treaty of commerce with the Republic of New Granada signed on the 20th of December, 1844, I transmit a report from the Secretary of State and the documents by which it was accompanied. JAMES K. POLK. WASHINGTON, _January 19, 1847_. _To the House of Representatives of the United States_: I transmit herewith a report of the Secretary of War, with the accompanying report from the Adjutant-General of the Army, made in compliance with the resolution of the House of Representatives of the 5th instant, requesting the President to communicate to the House "the whole number of volunteers which have been mustered into the service of the United States since the 1st day of May last, designating the number mustered for three months, six months, and twelve months; the number of those who have been discharged before they served two months, number discharged after two months' service, and the number of volunteer officers who have resigned, and the dates of their resignations." JAMES K. POLK. WASHINGTON, _January 20, 1847_. _To the House of Representatives of the United States_: