As regards the universal medicine, said to depend on alchemical research, we discover no earlier or plainer traces than in this author, and in Aeneas Gazeus, another Greek writer, towards the close of the same century;[71] nor among the physicians and materialists, from Moses to Geber the Arab,[72] who is supposed to have lived in the seventh century. In that author's work, entitled the "Philosopher's stone," mention is made of medicine that cures all leprous diseases. This passage, some authors suppose, to have given the first hint of the matter, though Geber himself, perhaps, meant no such thing; for, by attending to the Arabic style and diction of this author, which abounds in allegory, it is highly probable that by man he means gold, and by leprous, or other diseases, the other metals, which, with relation to gold, are all impure. The origin and antiquity of alchymy have been much controverted. If any credit may be placed on legend and tradition, it must be as old as the flood--nay, Adam himself is represented to have been an alchymist. A great part, not only of the heathen mythology, but of the Jewish Scriptures, are supposed to refer to it. Thus, Suidas[73] will have the fable of the philosopher's stone to be alluded to in the fable of the Argonauts; and others find it in the book of Moses, as well as in other remote places. But, if the era of the art be examined by the test of history, it will lose much of its fancied antiquity. The manner in which Suidas accounts for the total silence of alchymy among the old writers is, that Dioclesian procured all the books of the ancient Egyptians to be burnt; and that it was in these the great mysteries of chemistry were contained.[74] Kercher asserts, that the theory of the philosopher's stone is delivered at large in the table of Hermes, and the ancient Egyptians were not ignorant of the art, but declined to prosecute it. FOOTNOTES: [66] ------ nec Babylonios Tentaris numeros.--Lib, 1. ad XI. That is, consult not the tables of planetary calculations used by astrologers of Babylonish origin.