). A Greek historian, who in his youth
accompanied Alexander the Great on his campaigns. In his eighty-fifth year, when living at
Cassandrea in Thrace, he wrote a work upon Alexander, in which he recorded his careful
observations on geography, ethnography, and natural science. The book is highly praised for
its trustworthiness, but only fragments of it have reached us. He and Ptolemy were the chief
authorities for Arrian's Anabasis.