Thanks for 'Salix' specimens. Still working on 'Fucus' but thinks he has almost exhausted the coast here; has recently "converted" to [Erik] Acharius' system, and though there is much confusion, the arrangement is good. Encloses [cryptogamic] specimen from James Hoy's, of Gordon Castle, collection; it is not, as Hoy states, 'Lichen hebraicus', nor 'Verrucaria purpurescens'. His opinion of Hoy's character and appearance.

Criticises Smith for doing "so much good" with "Flora Britannica", and then ceasing when "the whole scientific world" is in expectation of more.

Thanks for 'Jungermanniae' specimens from "that wonderfully promising young naturalist" [William Jackson] Hooker. Recommends Smith avoid anything that will "keep up or awaken the gall [...] of that worthless wasp" [Richard] Salisbury.

Clarifies that his comment about [James] Hoy's 'Ossigrapha' being more like figures of Hoffmann's 'Verrucaria purpurascens' than any other he could find; different from [Dawson] Turner's 'calcarea'. Turner has requested specimens of 'Fucus brodieii'; encloses some for Smith. Sent [Samuel] Goodenough specimens of 'Fucus brodieii' and 'F. lycopodioides'; Goodenough anxious to establish his varities of 'F. tetragonus' and 'F. escutentus'. Received new specimens from [George] Don, expects he will send to Smith as well, listed, with observations: 'Orbus', 'Lychris alpina', 'Myosotis nana' or 'M. lappula', 'Silene alpestre', 'Epilobium montanum', 'Hypericum barbatum', 'Erigerum uniflorum', 'Veronica allionii', 'Viola lutea', 'Hieracium alpinum' or 'H. villosum', and variety of 'Lamium amplixicaule'.