January 04, 1849
To the Senate of the United States:
I transmit to the Senate, for their consideration and advice with regard to its ratification, a convention between the United States of America and the Government of Her Britannic Majesty, for the improvement of the communication by post between their respective territories, concluded and signed at London on the 15th December last, together with an explanatory dispatch from our minister at that Court.
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/201789