Gen. Burnside expresses to President willingness to be relieved of command following arrest of former Cong. Vallandigham (Ohio) if interest of public service requires it. President supports Burnside. Abraham Lincoln to Ambrose E. Burnside, 29 May 1863, CW, 6:237.

Lincoln and Sec. Stanton visit Navy Yard to observe firing of Ferris gun. Bruce, Tools of War, 239-40.