One of the leading British psychologists of his time, Maurice Nicoll (1884-1953) was a student of C.Jung, G.I.Gurdjieff and P.D.Ouspensky. At Ouspensky's request, he devoted the last twenty years of his life to passing on the ideas he had received from his teachers. This devotion culminated in a five-volume work, Psychological Commentaries on the Teaching of G.I.Gurdjieff and P.D.Ouspensky.