Which botanist did Darwin begin a correspondence with about his theories? <SEP> Darwin continued to research and extensively revise his theory while focusing on his main work of publishing the scientific results of the Beagle voyage. He tentatively wrote of his ideas to Lyell in January 1842; then in June he roughed out a 35-page "Pencil Sketch" of his theory. Darwin began correspondence about his theorising with the botanist Joseph Dalton Hooker in January 1844, and by July had rounded out his "sketch" into a 230-page "Essay", to be expanded with his research results and published if he died prematurely.
Which botanist did Darwin begin a correspondence with about their theories? <SEP> Darwin continued to research and extensively revise these theories while focusing on the main work of publishing the scientific results of the Beagle voyage. They tentatively wrote of their ideas to Lyell in January 1842; then in June they roughed out a 35-page "Pencil Sketch" of their theory. Darwin began correspondence about their theorising with the botanist Joseph Dalton Hooker in January 1844, and by July had rounded out their "sketch" into a 230-page "Essay", to be expanded with their research results and published if they died prematurely.