João Maria Ferreira do Amaral was a distinguished and valiant officer of the Portuguese Royal Fleet. In 1821, he started his military career as a midshipman in the Brazilian Squadron of the Portuguese Navy posted in Brazil. In 1821, during Brazil's brief war of independence against Portugal, Ferreira do Amaral lost his right arm in the Battle of Itaparica. During the Portuguese Civil War, he was one of the few navy officers that managed to make his way from mainland Portugal to the Terceira island in the Azores, where the Liberal side had established its base. Throughout the war, he served as an officer in the navy of the Portuguese Liberal side. By the end of the war, Ferreira do Amaral was already a high-ranking officer in the Portuguese Navy. 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. His actions enraged the Chinese residents further, and he was assassinated on 22 August 1849 by seven Chinese men, who knocked him off his horse and cut off his head. This was the trigger for the Passaleão incident.
Marriage and issue
, was married to the deceased João Maria Ferreira do Amaralby proxy on 2 October 1849 in Lisbon, Santa Catarina. This marriage took place nearly two months after João Maria Ferreira do Amaral was killed. She did this to legitimize their son Francisco Joaquim Ferreira do Amaral and their daughter Joana Teresa de Albuquerque, Maria Helena de Albuquerque, 1st Baroness of Oliveira Lima. At the time of the marriage, Maria Helena de Albuquerque was unaware that João Maria Ferreira do Amaral was dead. At that time, Maria Helena was a widow and was taking advantage of the fact that her first husband, António Teixeira Dória, the Lord of the Portuguese colony of Macau, son of Francisco Teixeira Dória and Joana Margarida da Câmara, had died earlier that year. António Teixeira Dória, her first husband, whom she had married in 1836, was a first mate in a navy corvette, whose commander was João Maria Ferreira do Amaral. According to one of Maria Helena and João Maria’s descendants, Augusto Martins Ferreira do Amaral, 3rd Baron of Oliveira Lima, Maria Helena cheated on her first husband and had an affair with the commander of her first husband’s ship, who was João Maria Ferreira do Amaral. He would later become her second husband. It is also believed that her first son of her first marriage, João Eduardo Teixeira Dória, an artillery officer, was also João Maria Ferreira do Amaral's son, for he had similar features. Maria Helena later separated from her first husband and went to live in a convent. It was during this time that she conceived Francisco Joaquim Ferreira do Amaral, by the ship's commander; although this baby was baptized as son of João Maria Ferreira do Amaral and an unknown mother, to avoid being registered under the name of her first husband.
