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.