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.

Proceedings of the Society for Psychical Research

Vol. 34, London 1924.

Jules Romains

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

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