Discovery of 'Sphaeria' Micheli ["Plantarum genera"] Pl.104 Tab.55, sends drawing, discusses how it has been universally found growing parasitically on 'Lycoperdon cervinum', possibility of Linnaeus confounding 'Lycoperdon cervinum' with 'Lycoperdon spadiceum', believes they may have been first to disover the true 'L. cervinum' in England.
Received a 'Lichen fuliginosus' of [James] Dickson and a 'Lichen croceus' which accords to [John Lightfoot's] "Fl[ora] Scot[ica]", asks Smith to compare his specimens. Reviews James Bolton's "History of English Ferns", highlights errors with 'Polypodium aculeatum', 'Polypodium fragrans', 'Polypodium [thelypteris]', 'Polypodium lobatum'. Asks Smith's opinion of [Anders] Spaarman's "Voyage to the Cape". Asks likelihood of a good herbarium selling for between £20 and £50 at an auction such as the Duchess of Portland's. 'Phallus caninus' and 'Peziza stipitata' found.