Entail foundation deed by which Isabel da Silveira, daughter of Luís da Silveira and D. Branca de Mendonça, founded an entail and designated her sister D. Ana de Mendonça to be its first administrator. After her sister's death it should succeed her eldest son or, in his absence, her eldest daughter. If D. Ana de Mendonça died without heirs, it should succeed her husband D. João de Sousa, or the closest kin of the Silveira's family. The successors of this entail were also obligated to order the celebration of masses for her and her parents' soul. This entail is composed of "matos" and "arneiros" located in the place of "Virtudes", "marinhas" and "praias" called “Manois” , and the herdade of "Mendonças", on the outskirts of Avis.

Exemplification of an entail foundation deed made by Isabel da Silveira.

Exemplification of an entail foundation deed made by Isabel da Silveira.

Documents produced by the entail.