Member of the Royal Society of Literature; in 1906, 'Henry Proctor, Esq., M.R.A.S. living at 146, Mallinson Road, Clapham Common, S.W.
Monumental Facts v. Historical Fictions. By Henry A. Marchant, with Notes on Languages, by Henry Proctor, and Preface by the Rev. L. G. A. Roberts, R. Banks & Son: London, 1909 The Secret of Life. L. N. Fowler & Co.: London, 1912. 1912 The Evolution of Culture. L. N. Fowler: London, 1913. 1913 Perpetual Youth. An occult and historical romance. L. N. Fowler & Co.: London, 1913. Evolution and Regeneration. L. N. Fowler & Co.: London, 1911.
This publisher fits the 'higher thought' contributions that Proctor made in his books - explores Christianity as a mystical religion, of a piece with other world mystical religions.
A regular contributor to "The American Antiquarian and Oriental Journal", edited by the idiosyncratic Egyptologist, J. O. Kinnaman.