Scottish-born gardener and botanist. Apprentice on the estate of the earl of Camperdown, Scotland. Foreman, Trinity College Garden, Dublin, 1828–34. Botanist to the Ordnance Survey of Ireland, 1834–8. Curator, and later director, Botanic Garden, Glasnevin, 1838–79. Specialist in mosses and liverworts. PhD, Zurich, 1863.
Sources: R. Desmond 1994ODNB (See the bibliography for full references to sources)