Proceedings of the American Society for Psychical Research

Vol. 11, 1917.

Journal of the Society for Psychical Research

Vol. 18, London 1917.

Stuart Cumberland

That other world: personal experiences of mystics and their mysticism

Grant Richards, London 1918.

Proceedings of the American Society for Psychical Research

Vol. 12, 1918.

Proceedings of the Society for Psychical Research

Vol. 30, 1918.

Proceedings of the Society for Psychical Research

Vol. 30, 1918.

Proceedings of the American Society for Psychical Research

Vol. 13, 1919.

Journal of the Society for Psychical Research

Vol. 19, London 1919.

Guy Lockwood

Mastership or mediumship. Which?

Self published, Kalamazoo 1920.

Journal of the American Society for Psychical Research

Vol. 14, 1920.