Morrell uses the word "terrapin", presumably referring to the Galapagos tortoise. The terms were used interchangeably in Morrell's day; for example see Charles Darwin in Keynes, R.D., ed. (1979). The Beagle Record. Cambridge: Cambridge University Press. ISBN978-0-521-21822-1. Retrieved March 1, 2009.{{cite book}}: CS1 maint: publisher location (link), p. 312
Jenssen, Elin Vinje (January 3, 2008). "Weather, wind and activity on Bouvetøya". Translated by Marte Lundberg. Norwegian Polar Institute. Archived from the original on January 19, 2015. Retrieved April 14, 2015.
Jenssen, Elin Vinje (January 3, 2008). "Weather, wind and activity on Bouvetøya". Translated by Marte Lundberg. Norwegian Polar Institute. Archived from the original on January 19, 2015. Retrieved April 14, 2015.
