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 given in doses of from half a drachm to one drachm as a gentle purge, or of three drachms if its full cathartic effect were required. The drug is not named by Hippocrates nor by Theophrastus.

Celsus describes it as specially valuable for city men and men of letters (urbani et literarum cupidi); he says it is an ingredient in all purgatives, and it is clear from the later Greek and Roman writers how highly this remedy was esteemed. In "Pharmacographia" Hanbury refers to the legend of Alexander the Great visiting the Island of Socotra at the instance of Aristotle particularly on account of the aloes grown there. It is said that Alexander left a colony of Ionians on the island in order to ensure a sufficient supply of the drug. Undoubtedly there were Greek Christians there in Mohammedan times and it is probable that the Arabs invented the Alexandrian origin of them.

The fame of aloes was well maintained by the Arabian physicians, and the old Greek and Roman formulas for aloetic compounds were passed on to the Middle Ages by Mesué of Damascus, together with some new ones. It was one of the drugs recommended to Alfred the Great by the Patriarch of Jerusalem.