Civil War Print Titled "Andersonville Stockade and Hospital. Probably circa 1870. States that it is a “true and correct picture… copied from the original pencil sketch, made by Felix de La Baume” Co. E 39th N. Y. Vols.
Source: HA.com auction
Andersonville print
The Civil War Gazette (est. 1995) 
I recently found what appears to be a copy of this sketch. I was told that copies were sold during the trial of Capt. Wirz. I am looking for more information.