Proceedings of the Society for Psychical Research

Vol. 34, London 1924.

Journal of the Society for Psychical Research

Vol. 22-23, London 1925.

Margery genuine says Conan Doyle; he scores Houdini

Boston Herald, 26 gennaio 1925.

G.B. Seybold

They Can See with Their Skin

Popular Science Monthly, dicembre 1925, p. 21.

Proceedings of the Society for Psychical Research

Vol. 35, London 1926.

Proceedings of the Society for Psychical Research

Vol. 35, London 1926.

Journal of the Society for Psychical Research

Vol. 24, London 1927.

Proceedings of the Society for Psychical Research

Vol. 37, London 1927.

Proceedings of the Society for Psychical Research

Vol. 38, London 1928.

Gwendolyn Kelley Hack

Modern Psychic Mysteries at Millesimo Castle

Rider, London 1929.