Elijah Farrington, Harry Price e Eric John Dingwall

Revelations of a spirit medium

Kegan Paul, Trench, Trubner, London 1922 (I ed. 1891).

Eliphas Levi e Arthur Edward Waite

The history of magic : including a clear and precise exposition of its procedure, its rites and its mysteries

Rider & Son, London 1922.

Journal of the Society for Psychical Research

Vol. 21, London 1923.

Proceedings of the Society for Psychical Research

Vol. 33, London 1923.

Jules Romains

Eyeless Sight: A Study of Extra-Retinal Visoin and the Paroptic Sense

G. P. Putnam's Sons, London 1924.

Proceedings of the Society for Psychical Research

Vol. 34, London 1924.