The history of hatha yoga is only now becoming clear through close attention to the textual tradition. This seminar examines the Vaishnava roots of some hatha yoga practice. Dr James Mallinson has a BA in Sanskrit from Oxford and an MA with a major in ethnography from SOAS. His DPhil. thesis at Oxford was a critical edition of the Khecarividya, a Kaula work on khecarimudra, an important technique of hathayoga. After his DPhil. he translated Sanskrit poetry for the Clay Sanskrit Library for six years. He then spent a year teaching Sanskrit at SOAS and is now helping to set up an institute of Indian classical studies at Lavasa in India while continuing his research into yoga and yogis.