Robert E. Lee's Resignation to Simon Cameron

April 20, 1861
Robert E. Lee

In the following letter, Robert E. Lee resigns from the Commission of Colonel of the 1st Regiment of Cavalry in the U.S. Army.

Arlington, Washington City P.O.
20 April 1861

Honble Simon Cameron
Sect. of War

Sir,

I have the honor to tender the resignation of my Commission of Colonel of the 1st Regt. of Cavalry.

Very respectfully your Ob’t servant

R. E. Lee
Col 1st. Cavalry