 Mardonius now repeated his offer of peace to the Athenian refugees on Salamis.Athens, along with Megara and Plataea, sent emissaries to Sparta demanding assistance and threatening to accept the Persian terms if it was not given.According to Herodotus, the Spartans, who were at that time celebrating the festival of Hyacinthus, delayed making a decision until they were persuaded by a guest, Chileos of Tegea, who pointed out the danger to all of Greece if the Athenians surrendered.