Produced by Stephen Hutcheson, Roger Frank and the Online Distributed Proofreading Team at https://www.pgdp.net THE QUEST SERIES Edited by G. R. S. MEAD, EDITOR OF ‘THE QUEST.’ _Crown 8vo. 2s. 6d. net each._ FIRST LIST OF VOLUMES. PSYCHICAL RESEARCH AND SURVIVAL. By James H. Hyslop, Ph.D., LL.D., Secretary of Psychical Research Society of America. THE QUEST OF THE HOLY GRAIL. By Jessie L. Weston, Author of ‘The Legend of Sir Perceval.’ JEWISH MYSTICISM. By J. Abelson, M.A., D.Lit, Principal of Aria College, Portsmouth. THE MYSTICS OF ISLAM. By Reynold A. Nicholson, M.A., Litt.D, LL.D., Lecturer on Persian, Cambridge University. BUDDHIST PSYCHOLOGY. By C. A. F. Rhys Davids, M.A., Lecturer on Indian Philosophy, Manchester University. RUYSBROECK. By Evelyn Underhill, Author of ‘Mysticism,’ ‘The Mystic Way,’ etc. THE SIDEREAL RELIGION OF THE ANCIENTS. By Robert Eisler, Ph.D., Author of Weltenmantel und Himmelszelt.’ [_In the Press._ London: G. BELL AND SONS LTD. RUYSBROECK BY EVELYN UNDERHILL AUTHOR OF ‘MYSTICISM,’ ‘THE MYSTIC WAY,’ ETC., ETC. LONDON G. BELL AND SONS LTD. 1915 FOR JESSIE TO WHOM IT OWES SO MUCH THIS LITTLE TRIBUTE TO A MUTUAL FRIEND EDITOR’S NOTE