Then the men of Ireland told Tamon the jester to put on Ailill's garments and his golden crown and to go on the ford in front of them. So he put on Ailill's garments and his golden crown and came on the ford in front of them. The men of Ireland began to scoff and shout and jeer at him. ‘It is the covering of a stump (tamon) for you, Tamon the jester’ said they, ‘to put on you Ailill's garments and his golden crown’. So that story is called Tuige in Thamon, the Covering of a Stump. Cú Chulainn saw Tamon, and it seemed to him, in his ignorance and want of information, that it was Ailill himself who was there, and he cast a stone at him from his sling and killed him on the ford where he was.
So that the place is Áth Tamuin and the story is called Tuige im Thamon.