http://www.mtholyoke.edu/courses/rschwart/hist255/popcorn/convictsmain.html
http://www.ursispaltenstein.ch/blog/weblog.php?/weblog/2007/05/P24/
http://www.jimandellen.org/gothic/Radcliffe.RofF19-20.html
http://www.prov.vic.gov.au/forgottenfaces/prisonsys.asp