04/16/1860
https://www.presidency.ucsb.edu...
"an extraordinary occasion requires the Senate of the United States to convene for the transaction of business at the Capitol, in the city of Washington, on the 4th day of March next, at 12 o'clock at ..."
"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."
"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."
"Their letter to him urging this delay bears date January 15, and was the commencement of a correspondence."