Salt Lake City: Litmus, Inc., distributed by The Cosmic Aeroplane, 1975. 64p., reproduced from typescript (some of which shrunk to need-a-magnifying glass size), first edition squareback perfectbound 8.5x5.5 inch wraps with two photos of Foster, edgeworn with some handsoil and a nick at the head. "Poems, with an introduction by Charles Potts." Also find a doodle and "notes towards an elegy" for T.S. Eliot. Textblock not yet cracked but liable to.
Foster, 1922 - 1967, left a very loyal bunch of copyright holders. NB, the peyote angle is obscure.