They had just finished dressing, when a knock was heard at the door, and a Spartan soldier came in and gravely informed Charon that the commander wished to see him. For a moment Pelopidas and his companions fancied that their plans were discovered, and that Charon had betrayed them. He read this suspicion in their frightened faces, and, before leaving the house with the soldier, he placed his only son, a mere infant, in the arms of Pelopidas, saying, “There, keep him; and if you find that I have betrayed you, avenge yourselves by killing my only child, my dearest treasure.”