Complex sentence: They were delivered up to the people of their several cities, and most of them were allowed to go uninjured into exile; but Coes, on the contrary, was stoned to death by the Mytileneans.
Split into simpler sentences: They were delivered up to the people of their cities. Most of them were allowed to go unhurt into exile other than Coes who was stoned to death by the Mytileneans.