Paul Donnelley: Essex Murders, Casemate Publishers, 2007, S. 25 (online, engl.)
Richard Whittington-Egan: Jack the Ripper – The Definitive Casebook, Amberley Publishing Limited, 2013, S. 185 (online, engl.)
Barb Karg, John K Young: 101 Things You Didn't Know About The Freemasons: Rites, Rituals, and the Ripper - All You Need to Know About This Secret Society!, Simon & Schuster, 2007 (online, engl.)