Henry Christmas

The cradle of the twin giants, science and history

Vol. 1, Richard Bentley, London 1849.

Henry Christmas

The cradle of the twin giants, science and history

Vol. 2, Richard Bentley, London 1849.

Catherine Crowe

The Night Side of Nature. Ghosts and Ghost-seers

Routeledge, London 1857.

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.

Carl Du Prel

The philosophy of mysticism

George Redway, London 1889.

Joseph Grasset

The marvels beyond science

Funk & Wagnalls, London 1910.

Stuart Cumberland

That other world: personal experiences of mystics and their mysticism

Grant Richards, London 1918.

Jules Romains

Eyeless Sight: A Study of Extra-Retinal Visoin and the Paroptic Sense

G. P. Putnam's Sons, London 1924.

Gwendolyn Kelley Hack

Modern Psychic Mysteries at Millesimo Castle

Rider, London 1929.