A letter by Osho to Deriaji (aka Babulal Ji Deria), dated 19 January 1960
A letter by Osho to Swami Anand Maitreya, dated 12 November 1970, published in Dhai Aakhar Prem Ka (ढ़ाई आखर प्रेम का), as letter #41.
Osho’s letter to Krishna Saraswati, 18 February 1971 – with a Sufi story. English translation by Ma Priyanshi.