 The law school operated in the sixteenth and seventeenth century, with a Giolla na Naomh Óg Ó Duibh dá Bhoireann being recorded as one of its chief owners in the seventeenth century.The O'Davorens's were recorded as still holding Cahermacnaghten in 1659, along with 13 Irish tenants.The most important surviving document associated with them is known as Egerton 88 (British Library), being compiled between 1564 and 1569.