365); and his work was the subject of a commentary by Theon's daughter Hypatia (d.
That St Catherine actually existed there is, indeed, no evidence to disprove; and it is possible that some of the elements in her legend are due to confusion with the story of Hypatia, the neo-platonic philosopher of Alexandria, who was done to death by a Christian mob.
His scientific interests are attested by his letter to Hypatia in which occurs the earliest known reference to areometry, and by a work on alchemy in the form of a commentary on pseudo-Democritus.
At Alexandria the noble Hypatia taught, to whose memory her impassioned disciple Synesius, afterwards a bishop, reared a splendid monument.
The murder of Hypatia was the death of philosophy in Alexandria, although the school there maintained a lingering existence till the middle of the 6th century.