Governor of Macau
After serving as a deputy governor for Angola, he was appointed as the 79th Governor of Macau on 21 April 1846. During his three-year tenure as governor, he implemented a range of policies to entrench Portugal's colonial authority over Macau. Within a month of taking office he demanded that all Chinese residents in Macau pay ground rent, poll tax and property tax. The Qing authorities in Macau immediately protested against his action and attempted to negotiate. However, beginning in 1849, he expelled all Qing officials from Macau, destroyed the Qing Customs and ceased paying ground rent to the Qing government.