"After that, it was pressed into service as a Parole Camp for Union soldiers returned North under the Dix-Hill Cartel."
Hugh,
I vaugley remember reading about the Federal Troops who were repaitriated to Camp Douglas. It seems that they were being treated by the guards at Camp Douglas as if they were Confederates and it caused a lot of consternation. The Paroled soldiers actually set several of the buildings on fire in protest. Can't remember where I read it but that is the jist of the story.
Frank