^ John Casey. (2009). After Lives: A Guide to Heaven, Hell and Purgatory. Oxford. p. 373. ISBN 978-0-19-997503-7 "The poet attended one of Home's seances where a face was materialized, which, Home's spirit guide announced, was that of Browning's dead son. Browning seized the supposed materialized head, and it turned out to be the bare foot of Home. The deception was not helped by the fact that Browning never had lost a son in infancy."
^ "Glossary of Key Words Frequently Used in Parapsychology" Archived 2010-12-24 at the Wayback Machine, Parapsychological Association website. "Materialization: A phenomenon of physical mediumship in which living entities or inanimate objects are caused to take form, sometimes from ectoplasm." Retrieved January 24, 2006 "Medium – Definition". Dictionary.com. Retrieved 23 March 2007.