Dedicated his "Phytographia" to Smith, apologises for its deficiencies. Desirous to establish a correspondence and exchange of plants, as few plants grow in Germany in the fields or gardens.

Sending description of trees and fruits grown in this area ["Berlinische Baumzucht" (1796)]. Observations on 'Sanchus alpinus', 'Sanchus vulgaris', 'Sonchus canadensis', 'Sonchus montanus', 'Sideroxylon spinosum', 'Rhanius pentaphyllus', and 'Arenaria juniperina'.

Sending part one of his edition of "Species plantarum", apologises for deficiencies; reliant on his own herbarium, not having access to England's "well-endowed" herbariums.

Sending second part of first volume of his edition of "Species plantarum". Will send Smith rare plants and diploma of their Society of Natural Scientists in a month's time.

Sending first part of second volume of his "Species plantarum", asks if Smith received the first volume and diploma of Society of Natural Scientists. Was unaware that Smith had named a genus 'Persoonia', in honour of [Christiaan Hendrik] Persoon; he also named a genus after Persoon in his "Species plantarum", proposes alternative 'Marshallia' for his, in honour of L B Marshall of Biberstein. Sending article from "Transactions of the Natural Scientists".

Sending second part of second volume of his edition of "Species plantarum", containing classes 'Dodecandria', 'Icosandria', and 'Polyandria'. Third volume, to follow shortly, will contain 'Didynamia', 'Tetredynamia', and 'Monadelphia'. Discusses various species of 'Carex' still under dispute, including 'Carex montana', 'C. leporina', 'C. canescens', 'C. globularis', 'C. ovalis', 'C. paradoxa', 'C. dioica', 'C. reflexa'.

Thanks for Australian plants and "Flora Britannica", most prizes the 'Carex vera leporina'. Sending seeds of 'Sonchus alpinus', 'Astragalus arenarius', and 'Kitaibelia vitifolia'. Will send recently published part of his edition of "Species plantarum".