Sgrol Maʼi Rgyud Kyi Byung Khung Gsal Bar Byed Paʼi Lo Rgyus Gser Gyi Phreng Ba

Is one of the most accomplished scholars of the unorthodox Jo-nan sect, strings together from various fragmentary sources a mine of legends and episodes on the origin and diffusion of Tara's tantra.
The Origin of Tara tantra, though not dependent on legends and largely anecdotal, has nevertheless about it a strong feeling of historic time and provides an important and accurate account of the lineages of the Siddhas who worshipped Tara and passed on her Upadesas, revelations and Tantra besides giving a background to the masters of the Tibetan Siddhas who grew from India's rich tantric soil.