To the Senate and House of Representatives:
I deemed it a duty to transmit to Congress with my message of the 8th of January the correspondence which occurred in December last between the "commissioners" of South Carolina and myself.
Since that period, on the 14th of January, Colonel Isaac W. Hayne, the attorney-general of South Carolina, called and informed me that he was the bearer of a letter from Governor Pickens to myself which he would deliver the next day. He was, however, induced by the interposition of Hon. Jefferson Davis and nine other Senators from the seceded and seceding States not to deliver it on the day appointed, nor was it communicated to me until the 31st of January, with his letter of that date. Their letter to him urging this delay bears date January 15, and was the commencement of a correspondence, the whole of which in my possession I now submit to Congress. A reference to each letter of the series in proper order accompanies this message.
James Buchanan, Special Message Online by Gerhard Peters and John T. Woolley, The American Presidency Project https://www.presidency.ucsb.edu/node/202111