An Encyclopaedia of Occultism

From Abracadabra to the Zohar: the classic 1920 reference to every occult science, seance trick, demon, alchemist and secret society — 2,000+ entries, all here.

The Séance Cabinet

The encyclopaedia's séance pages catalogue every rap, trumpet and cabinet trick the Victorian parlor produced — Spence documents them all with a folklorist's straight face. Now hold a séance of your own: write a message, copy the link, and when your sitter opens it the cabinet goes dark and your words come through the veil, letter by letter.

The Omen of the Day

The omen is drawn each day from a real entry of the 1920 encyclopaedia — the same for every visitor, as omens should be.

Rights & ReuseThe complete text of An Encyclopaedia of Occultism (1920) is in the public domain in the United States — like all works published before 1928 — and is free to read, download, quote, teach from, and reuse. This digital edition (its transcription, restored images, and site design) is © 2026 PhotoOpAI, and any editorial commentary we add is clearly marked as ours; the underlying public-domain text carries no such restriction.