A journal of the first voyage of Vasco da Gama, 1497-1499 (1898)
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https://archive.org/download/worksissuedbyha00unkngoog/worksissuedbyha00unkngoog.pdf

Vasco Da Gama and his successors, 1460-1580 (1910)
[archiveorg vascodagamahissu00jaynuoft width=560 height=384 frameborder=0 webkitallowfullscreen=true mozallowfullscreen=true]
https://archive.org/download/vascodagamahissu00jaynuoft/vascodagamahissu00jaynuoft.pdf

The three voyages of Vasco de Gama (1868)
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https://archive.org/download/voyageroundworld01tayl/voyageroundworld01tayl.pdf