May 07, 1864
To the Senate of the United States:
In compliance with the request contained in a resolution of the Senate dated April 30, 1864, I herewith transmit to your honorable body a copy of the opinion by the Attorney-General on the rights of colored persons in the Army or volunteer service of the United States, together with the accompanying papers.
ABRAHAM LINCOLN.
Abraham Lincoln, Special Message Online by Gerhard Peters and John T. Woolley, The American Presidency Project https://www.presidency.ucsb.edu/node/202245