on Touch; one on Fate; Opinions on the Passions; one treatise addressed to Timocrates; Prognostics; Exhortations; a treatise on Spectres; one on Perceptions; the Aristobulus; an essay on Music; one on Justice and the other Virtues; one on Gifts and Gratitude; the Polymedes; the Timocrates, a treatise in three books; the Metrodorus, in five books; the Antidorus, in two books; Opinions about the South Winds; a treatise addressed to Mithras; the Callistolas; an essay on Kingly Power; the Anaximenes; Letters.
XVIII. And I will endeavour to give an abridgment of the doctrines contained in these works, as it may be agreeable, quoting three letters of his, in which he has made a sort of epitome of all his philosophy. I will also give his fundamental and peculiar opinions, and any apophthegms which he uttered which appear worthy of being selected. So that you may be thoroughly acquainted with the man, and may also judge that I understand him.
Now the first letter is one that he wrote to Herodotus, on the