^Mendes, Peter (1993). Clandestine erotic fiction in English, 1800-1930: a bibliographical study. Scolar Press. p. 300. ISBN0-85967-919-5.
^Marcus, Steven (2009). The other Victorians: a study of sexuality and pornography in mid-nineteenth-century England. Transaction Publishers. pp. 147, 247–250. ISBN978-1-4128-0819-4.