 The influence of the Epistles on later (after the 12th century) Ismâ‘îli literature has been widely recognized (Stern 1964, 416–417; Diwald 1975, 26 ss.; Daftary 2007, 236). Their content has been transmitted and developed by subsequent thinkers of various persuasions. It is noteworthy, however, that extended literal quotations (and even translations) from the Ikhwân al-Safâ’ are found in the famous Ismâ‘îli thinker and missionary Nâsir-e Khosrow (1004–1074) (see Saccone 2007, 67–68; Baffioni 2013c and Poonawala in Baffioni, Poonawala 2017, 285 ff.): this may be a proof of the use of the Rasâ’il in 11th century Ismâ‘îli authors. If the Ikhwân al-Safâ’ were Ismâ‘îlis or in someway linked to Ismâ‘îlism, then Ismâ‘îlism influenced a much wider part of Islamic thought and culture than previously recognized.