Explains that the authority for habitats in "Flora Cantabrigiensis" and his supplements are all his, except 'Phleum paniculatum' which is on [James] Crowe's authority, and except for 'Salix rubra' found by [Samuel] Goodenough at Ely the other ['Salix'?] habitats are wrong. Lists two pages of new habitats for plants in "Flora Cantabrigiensis" for insertion [in "English Botany"]. Has sent [James] Sowerby and now Smith specimens of 'Potamogeton gramineum' and his Burwell plant, thinks it is the plant in "Flor. Dan. t.222" ["Flora Danica"?]. Lists two pages of new Cambridgeshire plants and habitats found since his last supplementum [over following two sides of the letter]. Commencing study of mints ['Mentha'], offers to send specimens of any not described by [William] Sole. List of plants sent, five are unnamed with habitats, but presumably 'Mentha'; plus 'Potamogeton gramineum', which Smith has annotated "only 'compressum'"; and possible 'Salix caprea', asks Smith to figure it if so.