Aelian’s Historical Miscellany, early 3rd century:
25. Thrasyllus of the deme of Aexone suffered a strange new form of madness. He left the city and went down to live at the Piraeus. He imagined that all the ships coming into harbour there were his own. He made a list of them, attended when they departed once more, and was delighted when they returned safely to the harbour. For a long time he continued to suffer from this mania. But his brother, returning from Sicily, handed him over to a doctor to be cured, and in this way he recovered from the illness. He often recalled his mad hobby and used to say that he had never been so happy as when he rejoiced at the sight of ships which did not belong to him returning safely
