Claude Debussy's instructions to the singers in his opera "Pelléas et Mélisande", as quoted in Henry William Simon "100 Great Operas and Their Stories" (p. 371), 1989.
"Definition of a Gentleman". Memorandum found in Lee's papers after his death. "Lee the American" by Gamaliel Bradford, p. 233, xroads.virginia.edu. 1912.