Big butt, big strap, big thwack.
"This one was fun to punish with the cane. I think I’ll keep her."
The instrument used was what is called in the south a “shake” — a split shingle, a yard or more long, and with one end whittled down to form a handle. The culprit was made to bend down until he could catch around his ankles with his hands. The part of the body thus brought into most prominence was denuded of clothing and “spanked” from one to twenty times, as Hill ordered, by the “shake” in some strong and willing hand. It was very amusing — to the bystanders. The “spankee” never seemed to enter very heartily into the mirth of the occasion. As a rule he slept on his face for a week or so after, and took his meals standing.
— John McElroy, Andersonville: A Story Of Rebel Military Prisons (fifteen months a guest of the so-called southern confederacy, a private soldier’s experience) (1879)