On the recommendation of Sir WJ Hooker, he was appointed naturalist on the voyage of exploration of the American west coast and Pacific by Henry Kellett on HMS Herald, 1847–1851, along with the naturalists Thomas Edmondston, and John Goodridge.
Thomas Edmondston (1825–1846), British-born botanist, son of Laurence
He discovered several rare plants growing on the serpentine rocks on Unst, including the endemic Shetland Mouse-ear Cerastium nigrescens, known as Edmondston's Chickweed on the island.
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