Turning to the more general authorities on the history of the Portuguese in India in the sixteenth century, it will be well to take them in a rough classification of their importance and authenticity.
João de Barros (1496-1570), for many years treasurer and factor at the India House at Lisbon, published Asia: dos Feitos que os Portuguezes fizeram no Descobrimento e Conquista dos Mares e Terras do Oriente. This work is a primary authority, as the writer had access to all documents, and was the recognised historian of the events he described during his lifetime. It is written in imitation of Livy, and is divided into Decades. The first Decade was published in 1552, the second in 1555, the third in 1563, and the fourth after his death in 1615, and it carries the history down to 1539. The best edition is that in nine volumes, Lisbon, 1777-78. A German translation by Dietrich Wilhelm Soltau was published in five volumes at Brunswick, 1821, and it has been largely borrowed from by succeeding writers.
Diogo do Couto (1542-1616) was long employed in India, and had access to documents. He continued the work of Barros in the same style. His first Decade overlaps Barros, and his history goes from 1526 to 1600. The best edition is that published as a continuation of Barros, in fifteen volumes, Lisbon, 1778-1787.
Gaspar Correa (died at Goa between 1561 and 1583) went to India in 1514 and was Secretary to Albuquerque. His Lendas da India treat the history of the Portuguese from 1497 to 1549, and was published for the first time at Lisbon, four volumes, 1858-64. His chronology throughout differs much from Barros, and a critical comparison between them is much needed. A portion of this work has been translated by Lord Stanley of Alderley, for the Hakluyt Society, under the title of The Three Voyages of Vasco da Gama, and his Viceroyalty, 1869.
Fernão Lopes de Castanheda (died 1559) travelled much in India. He published his Historia do Descobrimento e Conquista da India pelos Portuguezes, which covers from 1497 to 1549, in 1551-1561, and is therefore anterior to Barros in date of publication.
Damião de Goes (died 1573), Commentarius Rerum gestarum in India citra Gangem a Lusitanis, Louvain, 1539, is a small but early work.
These are primary authorities, but the following chronicles also contain some useful information:
Damião de Goes (died 1573), Chronica do felicissimo Rey Dom Manoel, Lisbon, 1566, 1567.
Jeronymo Osorio (died 1580), De Rebus Emmanuelis Regis, Lisbon, 1571.