About a thousand years ago in northeastern India a group of spiritual adepts known as siddhācāryas sang poems about the discipline required of the individual who seeks ultimate release. These carýāpadas, as the poems are called, were eventually compiled and recorded in a manuscript found about a century ago in the Nepali Court Library by a Bengali scholar (Sastri), since when concordances have been recognised in the Tibetan scriptures and numerous articles have been written about them by a variety of learned scholars. The carýāpadas have aroused considerable interest, among other reasons, because of their language, which is considered the earliest record of the Bengali tongue (Chatterji 1970, pp. 90–116), and because of their religious precepts, which are based upon tantra (Bagchi 1933, 1956A, B). Tantra teaches the individual to pursue his own release from phenomenal existence through direct, empirical means, through the manipulation of his own physical and psychical constitution, and these means are learned viva voce from a preceptor who also demonstrates the necessary techniques.