April 06, 1866
To the Senate of the United States:
I transmit, for the constitutional action of the Senate, a supplemental article to the Pottawatomie treaty of November 15, 1861, concluded on the 29th ultimo, together with the accompanying communications from the Secretary of the Interior and Commissioner of Indian Affairs.
ANDREW JOHNSON.
Andrew Johnson, Special Message Online by Gerhard Peters and John T. Woolley, The American Presidency Project https://www.presidency.ucsb.edu/node/203643