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Vol. 14, London 1898.

Chung Lin Soo e William Ellsworth Robinson

Spirit slate writing and kindred phenomena 

Munn & Company, New York 1898.

Journal of the Society for Psychical Research

Vol. 9, London 1899.

Proceedings of the Society for Psychical Research

Vol. 15, London 1900.

Journal of the American Society for Psychical Research

Vol. 1, 1901.

Journal of the Society for Psychical Research

Vol. 10, London 1901.

Proceedings of the Society for Psychical Research

Vol. 16, London 1901.

Proceedings of the Society for Psychical Research

Vol. 16, London 1901.