March 27, 1848
To the Senate of the United States.
I transmit herewith a report of the Secretary of State, with accompanying documents, in compliance with the resolution of the Senate of the 17th instant, requesting the President to communicate to that body "copies of the correspondence between the minister of the United States at London and any authorities of the British Government in relation to a postal arrangement between the two countries."
JAMES K. POLK.
James K. Polk, Special Message Online by Gerhard Peters and John T. Woolley, The American Presidency Project https://www.presidency.ucsb.edu/node/201515