Short answers, pulled from the story.
António Galvão was a Portuguese soldier, chronicler, and administrator born around 1490 as the son of Duarte Galvão. His father served as chief diplomat and chronicler to King Afonso V of Portugal, placing young António within the highest circles of Portuguese court life from his earliest days.
António Galvão sailed for Portuguese India in 1527 and took command of the fort of Ternate from the 2nd of May 1536 until 1540. During these four years, he sent missions to Papua and received local embassies while maintaining order as described in Chapter II of the Fifth Decade of Asia.
António Galvão handed the governance of the fortress to D. Jorge de Castro in 1540 and returned to Portugal only to learn he had fallen into disgrace. He spent his last years in anonymity and poverty at the Royal Hospital awaiting a pension that never fully arrived before dying there in 1557 when he was buried without ceremony.
A second manuscript titled Historia das Molucas remained unpublished after Galvão's death because Francisco de Sousa Tavares passed this document directly to the crown instead of printing it. A large portion appeared verbatim within Damião de Góis's Chronica del rey D. Manuel between 1566 and 1567, though all trace of the original Galvão manuscript disappeared after Góis died.
In 1928 researchers found a related history of Maluku in Seville's Archivo General de Indias which Hubert Jacobs arranged for publication as a bilingual edition in 1971 under the title A Treatise on the Moluccas. This version likely represented an early draft of the lost work created around 1544.