However, he did share them with certain other naturalists and friends, starting with Joseph Dalton Hooker, with whom he discussed his unpublished 1844 essay on natural selection.
Svoje je ideje ipak razmijenio s nekim naturalistima i prijateljima počevši s Josephom Hookerom s kojim je raspravljao o svom neobjavljenom eseju o prirodnoj selekciji iz 1844. godine.