Carlos Maria De Heredia

Spiritism and common sense

P.J. Kenedy & Sons, New York 1922.

George De Lawrence

How to answer questions in crystal gazing: how to lead up to questions, a study and analysis of actual questions, actual questions for practice study

Chicago 1922.

Willis Dutcher

On the other side of the footlights

Heaney Magic Company, Berlin 1922.

Elijah Farrington, Harry Price e Eric John Dingwall

Revelations of a spirit medium

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

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.