The wild boar scarred Ulysses during the hunt on Mt. Parnassus.
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“Then the old woman took the cauldron in which she was going to wash his feet, and poured plenty of cold water into it, adding hot till the bath was warm enough. Ulysses sat by the fire, but ere long he turned away from the light, for it occurred to him that when the old woman had hold of his leg she would recognise a certain scar which it bore, whereon the whole truth would come out. And indeed as soon as she began washing her master, she at once knew the scar as one that had been given him by a wild boar when he was hunting on Mt. Parnassus with his excellent grandfather Autolycus—who was the most accomplished thief and perjurer in the whole world—and with the sons of Autolycus. Mercury himself had endowed him with this gift, for he used to burn the thigh bones of goats and kids to him, so he took pleasure in his companionship. It happened once that Autolycus had gone to Ithaca and had found the child of his daughter just born. As soon as he had done supper Euryclea set the infant upon his knees and said, ‘Autolycus, you must find a name for your grandson; you greatly wished that you might have one.’ ”