“In a forthcoming monograph on pre-modern ha hayoga and its practitioners I identify a corpus of Sanskrit texts on early hathayoga, texts which are the sources for early ha hayoga’s syncretic systematization into the classical hathayoga of the Hathapradīpikā. In this article I shall examine the treatment in those works of siddhis, the supernatural powers which arise either directly or indirectly as a result of the practice of yoga or tantric rites.
The oldest traditions of hathayoga are informed by tantric yoga, both Śaiva and Pāñcarātrika, and traditions of brahmanical yoga found in, for example, the original Skandapurāa and the Mārkandeyapurāna. In a secondary stage of its development hathayoga was appropriated by practitioners in the traditions of Western Transmission (Paścimāmnāya) and, subsequently, Southern Transmission (Daksināmnāya) Kaula Śaivism. ..”