Castalia Foundation Millbrook Summer School Psychedelic Training Courses Brochure, 1966

The materials by and relating to Leary in this collection were assembled by rare books and contemporary art dealer John McWhinnie.

This collection contains circa 150 items comprised of manuscripts and documents by Leary; letters to and from Leary, including additional correspondence concerning him; documents and manuscripts relating to Leary's colleagues and associates in the psychedelic movement, and the various institutions and organizations they created; and psychedelic-related ephemera.