Marco Polo, The Travels of Marco Polo — Volume 1
“ Of these Aliites, eventually called Shiáhs, a chief sect, and parent of many heretical branches, were the Ismailites, who took their name, from the seventh Imam, whose return to earth they professed to expect at the end of the World. About A.D. 1090 a branch of the Ismaili stock was established by Hassan, son of Sabah, in the mountainous districts of Northern Persia; and, before their suppression by the Mongols, 170 years later, the power of the quasi-spiritual dynasty which Hassan founded had spread over the Eastern Kohistan, at least as far as Ḳáïn. ”
