Will made by Fernando Afonso Duque in which he ordered, among other dispositions, the foundation of an entail, composed of an estate named Herdade dos Duques, with a perpetual mass obligation of three masses celebrated every year on the mother church of Arronches. He named his wife Graça (or Garcia) Dias as first administrator of the entail with the condition that she annex her own reserved portion to the entail. Before her death, she would appoint one of their children, son or daughter, to succeed her with the same conditions. All administrators should bear the surname "Duque".