March 29, 1869
To the Senate of the United States:
In compliance with the request contained in the resolution of the Senate of the 17th instant, in regard to certain correspondence* between James Buchanan, then President of the United States, and Lewis Cass, Secretary of State, I transmit a report from the Department of State, which is accompanied by a copy of the correspondence referred to.
U. S. GRANT.
*Regarding the policy to be pursued to avert civil war, then threatening, which correspondence led to the resignation of Mr. Cass.
Ulysses S. Grant, Special Message Online by Gerhard Peters and John T. Woolley, The American Presidency Project https://www.presidency.ucsb.edu/node/204079