Darwin 1839, pp. 461–462Darwin, Charles (1839), Narrative of the surveying voyages of His Majesty's Ships Adventure and Beagle between the years 1826 and 1836, describing their examination of the southern shores of South America, and the Beagle's circumnavigation of the globe. Journal and remarks. 1832–1836, vol. III, London: Henry Colburn
Darwin 1839, p. 462. Darwin, Charles (1839), Narrative of the surveying voyages of His Majesty's Ships Adventure and Beagle between the years 1826 and 1836, describing their examination of the southern shores of South America, and the Beagle's circumnavigation of the globe. Journal and remarks. 1832–1836, vol. III, London: Henry Colburn
Darwin 1845, pp. 379–380 Darwin, Charles (1845), Journal of researches into the natural history and geology of the countries visited during the voyage of H.M.S. Beagle round the world, under the Command of Capt. Fitz Roy, R.N (2nd. ed.), London: John Murray
Darwin 1845, p. 380. Darwin, Charles (1845), Journal of researches into the natural history and geology of the countries visited during the voyage of H.M.S. Beagle round the world, under the Command of Capt. Fitz Roy, R.N (2nd. ed.), London: John Murray
Sulloway 2006 Sulloway, Frank J. (2006), "Why Darwin Rejected Intelligent Design"(PDF), in Brockman, John (ed.), Intelligent Thought: Science versus the Intelligent Design Movement, New York: Vintage, pp. 107–126