May 13, 1858
To the Senate of the United States:
I transmit herewith, for the constitutional action of the Senate, a treaty negotiated on the 19th of April, 1858, with the Yancton tribe of Sioux or Dacotah Indians, with accompanying papers from the Department of the Interior.
JAMES BUCHANAN.
James Buchanan, Message to the Senate Transmitting a Treaty with the Sioux Indians Online by Gerhard Peters and John T. Woolley, The American Presidency Project https://www.presidency.ucsb.edu/node/202714