Between 1881-1883 the Supreme Magus of the American Masonic Rosicrucian Society (the predecessor of the SRICF) issued four 'supplementary' rituals to its Colleges. Between 1939-1942 Voorhis republished three of them in issues Nos. 1-8 of his Rosicrucian bulletin, 'The Rose Petal.' We have reprinted Voorhis' material in facsimile and also located a manuscript copy of the only ritual he omitted, which we have typeset. This book includes, therefore, the complete set of Rosicrucian rituals: Zelator, Theoricus, Practicus and Philosophus. This book will be especially interesting to students of the Hermetic philosophy and to members of such traditions as the GD (RR et Ae, OTO, AMORC, BOTA, the Martinists, etc., and to esoterically inclined Freemasons.