Letter from Charles Darwin to Joseph Hooker
Natural selection mechanism of Evolutionary theory
He thanks Joseph Hooker for his objections to the mechanism of natural selection and he will respond by sending a fair copy of his manuscript when written.
Charles Darwin
Cambridge University Library
March 16, 1858
Letter from Joseph Hooker to Charles Darwin
Geological Survey.
Objections to the methods and conclusions of Charles Darwin's geological survey work.
Joseph Hooker
Cambridge University Library
March 18, 1850
Letter from John Henslow to Charles Darwin
Charles Darwin's voyage on the H.M.S. Beagle.
John Henslow was made aware of a naturalist position available with Captain Robert FitzRoy aboard the H.MS. Beagle and offered it to Charles Darwin.
John Henslow
Cambridge University Library
August 24, 1831
Letter from Thomas Huxley to Charles Darwin (including drawing)
Caricature of Charles Darwin and his relation to Christianity.
A letter sent from Thomas Huxley to Charles Darwin including a sketch (drawn by Huxley) of Darwin being worshiped as a bishop or saint.
Thomas Huxley
The Bridgeman Art Library
July 20, 1868
An Essay on the Principles of Population
The struggle for survival in human populations.
This manuscript outlined the difference in growth rates between human populations and agricultural production, stating that human populations increased exponentially while agricultural production followed an arithmetic growth rate, implying that agricultural production could not sustain the projected human growth identifying a struggle for survival within human populations.
Thomas Malthus
Toronto University Library
1798
On the Origin of Species by Means of Natural Selection
Theory of evolution by natural selection.
The manuscript of Charles Darwin's theory of evolution by means of natural selection with the table of content provided as a brief overview of the work. This conveys how expansive his theory was, indicated by the huge variation in topics and concepts included within his theory.
Charles Darwin
The Complete Works of Charles Darwin Online
1859
Principles of Geology (Volume 1)
Geology
The volumes promoted a uniformitarian system of geological process which influenced Darwin’s understanding of organic change by natural selection to be a slow process occurring over vast spans of time.
Charles Lyell
Burndy Library
1830
Principles of Geology (Volume 2)
Geology
The volumes promoted a uniformitarian system of geological process which influenced Darwin’s understanding of organic change by natural selection to be a slow process occurring over vast spans of time.
Charles Lyell
Burndy Library
1831
Vestiges on the Natural History of Creation
Theories of geological and organic change over time.
This manuscript was published anonymously (later determined to be Chambers) and outlined an early but inaccurate theory of organic change over time that's greatest contribution was facilitating the start of discussion surrounding evolution by natural causes later in the 19th century.
Robert Chambers
Yale Medical and Historical Library
1844
On the Tendency of Species to Form Varieties
Theory of transmutation of species by natural cause.
The manuscript provides a brief and unpolished theory of species transmutation by natural cause. In the words of Darwin, a better abstract for his own theory could not have been drafted influencing Darwin and Wallace's collaboration in the following years.
Alfred Wallace
The Complete Works of Charles Darwin Online
1858