A most interesting and historically important sect of Islam has been the division of the Shī‘a known as the Seveners. Although they have been divided by many schisms, and given rise to at least one separate religion, they all trace their spiritual parentage of Ismā‘īl, eldest son of the sixth Imām of the Twelvers, Ja‘far al-Sāḍiq. Ismā‘īl is said by some Twelvers to have died before his father, by others to have been disowned for a fault ranging from drinking wine to participating in religious…