Youngkin 2005, p. 312: "The Grand Order of Water Rats ... inducted Lorre into the oldest theatrical fraternity in the world the following day. Having developed a close friendship with the actor (Lockwood), and feeling that he would fit the requirements (two years' experience as a professional entertainer; no objections from any other Rat; fund-raising activities for charity), Lockwood proposed Lorre for membership in the elite charitable organization." Youngkin, Stephen (2005). The Lost One: A Life of Peter Lorre. The University Press of Kentucky. ISBN978-0-8131-7185-2.