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Erasistratus, a physician, realising that the illness of Antiochus (son of Seleucus I) is lovesickness for his stepmother Stratonice, by observing that Antiochus's pulse rate rises when ever he sees her. Engraving by P. Baquoy after A. Desenne after G. de Lairesse. Wellcome Collection. Public Domain Mark. Source: Wellcome Collection.