Documents produced by the entail.

Entail foundation deed by Lopo de Brito, fidalgo da casa do rei and member of the king's council, and his wife Iria Freire de Brito. They both reserved their "terças" for the establishment of a "morgado", including in this part of the inheritance the farmstead of Valbom, in Alchochete. The surviving member of the couple had the right to choose which of their children would be the administrator of the entail. It was also stipulated that the income from the estates was to be used for the perpetual celebration of masses in the church where they were to be buried. An inventory of the assets of the entail was to be drawn up, with two certified copies: one for the administrator and the other to be kept at the Hospital de Todos-os-Santos in Lisbon. The succession would pass first to the first-born sons, excluding clerics and illegitimate children. In addition, the administrator had to be physically and mentally fit, loyal to the Crown, obliged to include other estates in the entail, and forced to use the name and coat of arms of the Britos.