Fin Mac Coll was hunting with his Fenians south of Ballyshannon.
Three strange men approached the company.
“Let no one speak before they get to me,” said Fin.
The three interlopers said nothing until they stood before Fin.
“Our names are Brown, Black and Grey,” said they, “we have come to take service with you.”
Fin so liked the look of the three men that he brought them back to Tara with him and called them his ‘sons’.
As night approached he took them to one side.