Letter from Henry Thomas Colebrooke to Nathaniel Wallich in which he thanks Wallich for his correspondence and specimens, and congratulates him on his progress in natural history. Colebrooke suggests a name for a plant that he has described and in the post script reflects and changes the name. He advises pursuing certain avenues in research. Colebrooke encloses a receipt for Wallich's fee for the Linnaean Society (not with letter). Handwritten, dated 8 June 1819, received 16 November 1819.