He was a partidary and always followed the cause of Miguel of Portugal, who by Decree of 18 March 1829 appointed him the 55th Governor and Captain General of the Province of Angola (with capital at São Paulo de Luanda, where his children were born), where he struggled with the greatest hardships, lack of resources of all kind, which the Metropole, handling the civil fights (it is not known if he had the chance of taking part in the conflict while at Portugal between 1828 and 1829), could not send him. However, he remained in the hard exercise of his office until the acclamation of Maria II of Portugal in 1834, when a Military Junta took over the office until 1836 and thanks to the Concession of Evoramonte he retired with his family unharmed and without being prosecuted nor deprived of any received honour. Meanwhile, he had become Lord of several Majorats and Lord of the House or Paço of os Arcos, all in Santa Comba Dão, Santa Comba Dão, succeeding in the House to his father on 21 October 1833, and returned to Santa Comba Dão to take over his estates.