John Leo. See Leo.

Sex. Julius, of Emmaus in Palestine, a learned Christian historian of the third century, who wrote a chronicle extending from the date of the creation to A.D. 221, of which copious extracts exist in the Chronicon of Eusebius, besides many fragments in Synecus, Cedrenus, and the Paschal Chronicle. Eusebius has also given some extracts of his letter to Aristides reconciling the apparent discrepancy of St Matthew and St Luke in the genealogy of Christ. His letter to Origen, impugning the authority of the book of Susanna, and Origen's answer, are both extant. To Africanus is also ascribed a work entitled Keros, treating of medicine, agriculture, natural history, the military art, &c., of which extracts have been published, and some of the books are said to exist still in MS.