Will of Maria da Silva, widow of Cristóvão de Brito. The testator decided to set up an entail, using the property she owned in Lisbon, and to be buried in the church of the convent of Madre de Deus de Lisboa, where her late husband had been buried and where perpetual masses were to be celebrated. She appointed her granddaughter Maria, daughter of Lopo de Brito, as administrator. Hereditary succession would go primarily to firstborn sons, excluding illegitimate children and clerics. The successor had to be physically and mentally fit and was forbidden to marry anyone of New-Christian descent. In addition, each administrator was forced to entail estates and to use the family name.

Followed by the approval deed (1631-06-01) and the opening deed (1631-06-03).