The Red Acorn - http://www.gutenberg.org/ebooks/2766John McElroy (1846–1929) was an American printer, soldier, journalist and author, known mainly for writing the novel The Red Acorn and the four-volume Andersonville: A Story of Rebel Military Prisons, based upon his lengthy confinement in the Confederate Andersonville prison camp during the American Civil War.(Wikipedia)
Andersonville: A Story of Rebel Military Prisons - http://www.gutenberg.org/ebooks/3072