A. Trevor Barker
Alfred Trevor Barker (1893-1941) is best known for his transcription and compilation of two essential theosophical publications: The Mahatma Letters to A. P. Sinnett and its companion volume The Letters of H. P. Blavatsky to A. P. Sinnett. An early student with Maud Hoffman of P. D. Ouspensky and G. I. Gurdjieff, he was also a member of The Theosophical Society (Adyar). He later joined the Theosophical Society, then headquartered at Point Loma, California, of which he was for a number of years President of its English Section. His lectures and writings were compiled into the posthumously-published book, The Hill of Discernment.