Maybe not that useful, but some reference to Dasnamis to be found in: Wilson, Horace Hayman, "Essays and Lectures Chiefly on the Religion of the Hindus. A Sketch of the Religious Sects of the Hindus", London, first edition 1828 Oman, John Campbell, "The Mystics, Ascetics and Saints of India", T. Fischer Unwin, London 1903 Jaap Pranger