Isabel Beatriz de Azevedo Pereira e Sousa was born in the parish of Urzelina on November 23, 1837. She married a son of Lieutenant-Colonel Miguel Teixeira Soares de Sousa, the patriarch of one of the most affluent and influential families of the island of São Jorge. The Bacelada estate was part of a vast land inheritance. After the death of the Lieutenant-Colonel and their children, the Viscondessa became the sole administrator of their properties. She was especially drawn to the Bacelada estate.
As a result of her dedication to local charity causes, King Don Carlos of Portugal awarded her the title of Viscondessa de São Mateus on October 25, 1894. Incidentally, St. Matthew is the patron saint of the parish of Urzelina.
The Viscondessa was the great-great aunt of the current owner of the Bacelada estate.