George W. Alexander and Castle Thunder: A Confederate Prison and Its Commandant - Frances Harding Casstevens - Google Books

https://books.google.de/books?id=NupsSGl-B2gC&pg=PA121#v=onepage&q&f=false

Captain George W. Alexander was a controversial figure in Richmond duringthe Civil War, honored as a hero and condemned as a cruel prison superintendent. He was appointed Provost Marshall and put in charge of Castle Thunder in 1862, after escaping…