Keynes, R. D. ed. 2001. Charles Darwin's Beagle diary. Cambridge: Cambridge University Press. pp. 272–273
Darwin, C. R. 1839. Narrative of the surveying voyages of His Majesty's Ships Adventure and Beagle between the years 1826 and 1836, Journal and Remarks 1832–1836. London: Henry Colburn. p. 341