George Gustav Zerffi

Spiritualism and animal magnetism : a treatise on dreams, second sight, somnambulism, magnetic sleep, spiritual manifestations, hallucinations, and spectral visions

Robert Hardwicke, London 1871.

Maximilian Schele de Vere

Modern Magic

G.B. Putnam & Sons, New York 1873.

Persifor Frazer

Mind Reading

Social Science Association, Philadelphia, 12 maggio 1875.