Our information on the negotiations of the year 367 derives mostly from Xenophon (Hellenica VII, 1, 33-38) and Plutarch (Pelop., 30-31, 1; Artax. 22, 8-12).Xenophon’s account shows an anti-Theban bias; his information is of Athenian origin and could derive from the Athenian ambassador Leon. On the contrary, Plutarch’s account in the Life of Pelopidas shows a sharp pro-Theban bias.Xenophon’s information, although biased, appears to be of better quality. He offers a detailed account, with a strictly political statement; his account identifies the main lines of Theban hegemonic policy. Furthermore, Xenophon is the only source which provides us detailed information on the behaviour of the Athenian ambassadors. The historian se...