The initial sources for the main narrative was probably Ephorus, but his account came to an end in 356 BC, and Diodorus' sources after that point are disputed. Possibilities include Demophilus, Diyllus, Duris of Samos and Theopompus; contradictions in his account suggest that he was following multiple sources simultaneously and did not succeed in combining them perfectly.[16] The Sicilian material probably draws on Timaeus and also cites Athanis [de].[17]