^Bevis, Matthew. (2013). The Oxford Handbook of Victorian Poetry. Oxford University Press. p. 432.
ISBN978-0198713715
^Brock, William Hodson. (2008). William Crookes (1832-1919) and the Commercialization of Science. Science, Technology, and Culture, 1700-1945. Ashgate Publishing. p. 440.
ISBN0-7546-6322-1
^Luckhurst, Roger. (2012). The Mummy's Curse: The True History of a Dark Fantasy. Oxford University Press. p. 46.
ISBN978-0-19-969871-4
^Oppenheim, Janet. (1988). The Other World: Spiritualism and Psychical Research in England, 1850-1914. Cambridge University Press. p. 57.
ISBN978-0521347679
^Oppenheim, Janet. (1988). The Other World: Spiritualism and Psychical Research in England, 1850-1914. Cambridge University Press. p. 140.
ISBN978-0521347679