Having made these arrangements and left duplicate deeds in his house, he went to serve abroad with Thrasyllus. He was killed at Ephesus409 B.C. Thrasyllus was one of the commanders who were executed after Arginusae, 406 B.C.: for a time Diogeiton concealed from his daughter the death of her husband, and took possession of the deeds which he had left under seal, alleging that these documents were needed for recovering the sums lent on bottomry.