In the Babylonian Talmud (Babhli) there is no gemara to the smaller tractates of Order r, and to parts of ii., iv., v., vi.
The ten books of Stromata (in which Origen compared the teaching of the Christians with that of the philosophers, and corroborated all the Christian dogmas from Plato, Aristotle, Numenius and Cornutus) have all perished, with the exception of small fragments; so have the tractates on the resurrection and on freewill.2 6.
These two tractates, with which `Ilayyuj had laid the foundations of scientific Hebrew grammar, were recognized by Abulwalid as the basis of his own grammatical investigations, and Abraham Ibn Daud, when enumerating the great Spanish Jews in his history, sums up the significance of R.
The collection of his Opera Omnia Theologica (Amsterdam, 1681), folio, in a Dutch version, comprises twenty-three tractates, with reference to nine unprinted.
Among his several tractates, the most important is obitu (1536), translated into English by Henry Bennet (1561).