Sends two copies of his book ["Primitiae florae Essequeboensis" (1818)], which he has dedicated to the Linnean Society, "renowned in England as well in the whole Continent". Intends to dedicate himself to botany; would appreciate an "alliance" with the Linnean Society. He is working on a "Flora Gottingenssis", which will include a new system of lichens and fungi and a "geognostix" description of the country. He is also writing a monograph on 'Alnus' and 'Betula'; Sir Joseph Banks has provided specimens. Asks Smith to reply via the Duke of Cambridge [Prince Adolphus (1774-1850)].

Sends two copies of his book ["Beitrage zur chorographischen Kenntniss des Flussgebiets" (1822)]. He is commissioned by the King to produce a "Flora Hannoverana"; intends to arrange it on example of "Flora Danica". Requests exchange of "interesting and rare plants of England" in return for "several rare and new species of African plants"; he has a large collection from last 17 years.

Apologises for being unable to send Smith Essequebo plants as he had already given his duplicates to [Joseph Franz] Jacquin. Proposes a German edition of "English botany", regarding which he has already written to [James] Sowerby requesting the plates; few copies of the original in Germany owing to its high price; if Smith agrees requests critical notes on the species.