Marco's Comments:
In 1937, Ormond McGill published some articles for "Tops" about mental and bizarre magic. These articles have been reprinted by Abbott and later by Supreme (no date, but should be in the mid-late sixties). This is one of Supreme's set. They are fairly difficult to find, and sell from 50 to 100 US$. Magic Books by Post sells the whole (Supreme) set for £30.