"The War for the Union: The Organized war to Victory, 1864–1865" (1971) pp 97–143* Nicolay, John G. and John Hay, "Abraham Lincoln: A History" (1890) vol 9 ch 3, 15, 16.
"Andrew Johnson and Reconstruction" (1960)* Nicolay, John G. and John Hay, "Abraham Lincoln: A History" (1890) vol 9 ch 3, 15, 16.