Africanus wrote
Chronographiai, a history of the world in five volumes. The work covers the period from Creation to the year 221 AD. He calculated the period between
Creation and
Jesus as 5,500 years, placing the
Incarnation on the
spring equinox in
AM 5501 (25 March, 1 BC). While this
implies a birth in December, Africanus did not specify Jesus's birth date. This method of reckoning led to several Creation eras being used in the
Greek Eastern
Mediterranean, which all placed Creation within one decade of 5500 BC. The history, which had an apologetic aim, is no longer extant, but copious extracts from it are to be found in the
Chronicon of
Eusebius, who used it extensively in compiling the early episcopal lists. There are also fragments in
George Syncellus,
Cedrenus and the
Chronicon Paschale. Eusebius gives some extracts from his letter to one Aristides, reconciling the apparent discrepancy between Matthew and Luke in the genealogy of Christ by a reference to the Jewish law of
Levirate marriage, which compelled a man to marry the widow of his deceased brother, if the latter died without issue. His terse and pertinent letter to
Origen impugning the authority of the part of the
Book of Daniel that tells the story of
Susanna, and Origen's lengthy answer, are both extant. The ascription to Africanus of an encyclopaedic work entitled
Kestoi ( "Embroidered"), treating of agriculture, natural history, military science, and other subjects, has been disputed on account of its secular and often credulous character.
August Neander suggested that it had been written by Africanus before he had devoted himself to religious subjects. A fragment of the
Kestoi was found in the
Oxyrhynchus papyri. According to the
New Schaff-Herzog Encyclopedia of Religious Knowledge, the Kestoi "appears to have been intended as a sort of encyclopedia of the material sciences with the cognate mathematical and technical branches, but to have contained a large proportion of merely curious, trifling, or miraculous matters, on which account the authorship of Julius has been questioned. Among the parts published are sections on agriculture, liturgiology, tactics, and medicine (including veterinary practise)." ==Verification of Moses==