Baba Hari Dass

Baba Hari Dass first came to the attention of the West in the book by Baba Ram Dass, Be Here Now. Ram Dass' Guru, Maharaj-ji, AKA Neem Karoli Baba, instructed Ram Dass to receive teachings from Baba Hari Dass, who taught Ram Dass Ashtanga Yoga using only a chalkboard. wiki