You use the phrase brutal Rebels. Don't be cheated in that way. There are enough brutal Rebels no doubt, but we have brutal officers and men too. I have had men brutally treated by our own officers on this raid [to Lynchburg, Va.]. And there are plenty of humane Rebels. I have seen a good deal of it on this trip. War is a cruel business and there is brutality in it on all sides, but it is very idle to get up anxiety on account of any supposed peculiar cruelty on the part of Rebels. Keepers of prisons in Cincinnati, as well as in Danville, are hard-hearted and cruel.
Letter to Lucy Webb Hayes, whose cousin was a prisoner and died at Andersonville prison (2 July 1864) - Diary and Letters of Rutherford Birchard Hayes (1922 - 1926)