Giri, for his constant guidance, support, and example. Durga Das Shastri, for inspiring our interest in these secrets. Pagala Baba, for his Yogic demonstrations and sound advice. Dr. Bindu Joshi, for his insights into Indian medicine and alchemy. Dr. Jyotir Mitra, for his erudite scholarship and alchemical advice. Yogiraja Vaidyaraja, for sharing personal Yogic experiences with us. Yogini Rajyalakshmi Devi, for demonstrating advanced Yogic techniques. Mahamahopadhyaya Gopinath Kaviraj, for his generosity and scholarship. Swami Pratyagatmananda Saraswati, for his help and encouragement. Dr. Ramesh Khandelwal, for sharing sources and information. C. M. Chen Yogi, for his generosity and spontaneity. Yogini Ma Bhairavi, for practical and direct advice. The Gyalwa Karmapa, Rangjung Rigpe Dorje, for his generosity and help. Lama Dudjom Rinpoche, for his encouragement. Lama Kunzang Rinzing, for sharing many secrets. Lama Dodrup Chen, for his generosity and guidance. Lama Tulku Tsewang, for his willingness to discuss difficult topics. Ehud Sperling, for his belief in the project and for his dedication and participation in all stages of its creation. Without his commitment, this work would never have been completed. Lisa Sperling, for her belief in and support of this project. Donald Weiser, for pointing us in the right direction. Michael Rubinstein, for sound advice when we needed it. Sir Roland Penrose, for support and encouragement. Albion Jennings, for support and good advice. Bhaskar Bhattacharya, for constructive suggestions and assistance. Mark Dyczkowski, for the contribution of material. Dr. A. Powell, for translation from Latin. Dr. Andrija Puharich, for technical advice. Richard Ravenal, for help and encouragement. The following have generously contributed original material on which illustrations have been based: David Salmon, Victor Lownes, Ravi Kumar, Navin Kumar, Firouzeh Diba, Michael Hudson, Meryl White, Caterine Milinaire, Dr. Stephen Fulder, David Tremayne Ltd., the British Museum, the Victoria and Albert Museum, Bharat Kala Bhavan, the British Library Board, the Art Institute of Chicago, the Royal Ontario Museum, the Bhaktapur Museum, the National Museum of New Delhi, the Benares Hindu University, and the Kronhausen Erotic Art Collection, as well as others who wish to remain anonymous. We would also like to thank Claudine Fischer, Jeanie Levitan, and all those at Destiny Books who have selflessly contributed to this project. To all those who have in any way helped bring this book to completion, we extend our thanks and deep appreciation. NIK DOUGLAS & PENNY SLINGER 324 acknowledgments