Numerous myths associated with different invaders in Irish mythology exist as to the origins of Brehon Law. In Milesian folklore, "The Scholar's Primer" describes the first Brehon or lawgiver as being Caí Caínbrethach ("Fair-Judgement"), he fostered and was a mentor to a Son of Mil known as Amorghain Glúngheal, who later would become Chief Ollamh of Ireland and he also was said to be the 72nd disciple of the school of Fénius Farsaid. Caí in legend, first arrived in Ireland in the company of the Mil Espaine on board a ship, during the Milesian conquest of Ireland.