The Origins and Evaluations of Hadith Transmitters in Shi`i Biographical Literature

In this paper, I examine the provenance of the Shi`i biographical lexica on the imams’ disciples (the rijal) and propose possible reasons for the composition of these works in the eighth and ninth centuries. I then consider the authentications (tawthiqat) of those who report traditions from the imams and compare and contrast the methods of authentication in both the early and later biographical works. I also suggest possible reasons for the development of subsequent modes of authentication.