None of the works attributed to him are still extant, but quotations and references have survived in the works of others, especially in those of two early Christian writers – Justin Martyr (ca. 100-165 CE) in Samaria and the mid-3rd century Lactantius in North Africa – who drew on them by way of confirmation that what themselves held to be revealed truth had already been uttered. Only one of these pseudepigraphic works – referred to as the "Book of Hystaspes" or the "Oracles of Hystaspes" or just "Hystaspes" – is known by name. This work (or set of works) of the first century BCE is referred to by Lactantius, Justin Martyr, Clement of Alexandria, Lydus, and Aristokritos, all of whom describe it as foretelling the downfall of the Roman empire, the return of rule to the east, and of the coming of the saviour.