Sending cryptogamic specimens of plants described in Rohmer's "Botanical Diary" ["Botanical Magazine", part 1, June 1794] and two other commentaries. Asks permission to send paper for Linnean Society on new cryptogams. Engaged in researching synonyms of fungi; requests specimens of fungi described by Linnaeus, including: 'Agaricus betulinus', 'Boletus favus', 'B. tuberosus', 'B. fomentarius', 'B. igniarius', and 'B. subsquamosus', 'Hydrum parasiticum', 'H. imbricatum', 'Clavaria digitata', 'Helvella pineti', 'Clathrus delicatus', 'Lycoperdon truncatum', 'L. variolosum', 'L. radiatum', 'L. aurantium', 'Mucor sphaerocephalus', 'M. embolus', 'M. fulvus', 'M. furfuraceus', and 'M. clavatus'.