London: Sigma, 1964. Foolscap format, [i], 5 pp, mimeographed from typescript and stapled once at the upper left hand corner [copper].
Early issue of the Sigma Project, beginning with a cover letter by Trocchi introducing his contribution to "an interpersonal log-book entitled Potlatch," with reference to the Lettristes, T.E., Lawrence, etc. Despite the diminuitive appearance one of the most substantial elements of the project.
"Sigma 4" in pencil in an unknown hand to upper margin. Some minor creasing else fine. Item #28839