References

• 1887The life and letters of Charles Darwin : including an autobiographical chapter543 cited
• 1854On the Monkeys of the Amazon502 cited
• 2014The Correspondence of Charles Darwin425 cited
• 1994The Development of Darwin's Theory: Natural History, Natural Theology, and Natural Selection, 1838–1859416 cited
• 1845Vestiges of the natural history of creation339 cited
• 1855XVIII.—On the law which has regulated the introduction of new species272 cited
• 1909The foundations of the origin of species, two essays written in 1842 and 1844230 cited
• 1853A narrative of travels on the Amazon and Rio Negro, with an account of the native tribes, and observations on the climate, geology, and natural history of the Amazon valley204 cited
• 1975Charles Darwin's Natural Selection: Being the Second Part of his Big Species Book Written from 1856 to 1858.143 cited
• 1975Charles Darwin's Natural Selection: Being the Second Part of his Big Species Book Written from 1856 to 1858135 cited
• 1988The correspondence of Charles Darwin131 cited
• 1856III.—On the habits of the Orang-Utan of Borneo93 cited
• 1993The Correspondence of Charles Darwin84 cited
• 1975Wallace and Natural Selection77 cited
• 1980Darwin's botanical arithmetic and the ?principle of divergence,? 1854?1858