Patrick Matthew dating history

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Patrick Matthew (20 October 1790 – 8 June 1874) was a Scottish grain merchant, fruit farmer, forester, and landowner, who contributed to the understanding of horticulture, silviculture, and agriculture in general, with a focus on maintaining the British navy and feeding new colonies. He published the basic concept of natural selection as a mechanism in evolutionary adaptation and speciation in 1831 (i.e. resulting from positive natural selection, in contrast to its already, widely known, negative role in removal of individuals in the Struggle for Survival), but did not further develop or publicize his ideas. Consequently, when Charles Darwin later published On the Origin of Species in 1859, he and Alfred Russel Wallace were regarded by their scientific peers as having originated (independently of each other) the theory of evolution by natural selection; it has been suggested that Darwin and/or Wallace had encountered Matthew's earlier work, but there is no hard evidence of this. After the publication of On the Origin of Species, Matthew contacted Darwin, who in subsequent editions of the book acknowledged that the principle of natural selection had been anticipated by Matthew's brief statement, mostly contained in the appendices and addendum of his 1831 book, On Naval Timber and Arboriculture.