Has just returned from Lewis [Lewes], Sussex, surprised to find herbarium of [Peter Simon] Pallas in possession of [John Marten] Cripps [(1780-1853) traveller and antiquary]. It contains all the plants of "Flora Rossica", Gmelin's "Flora Sibirica", and Pallas' "Travels". Also complete collection of Forster's plants, and several of Sir Joseph Banks' South Sea plants, Pallas being the only person Banks sent any to. Pleased with Smith's "Exotic Botany". A "curious conversation" at Soho Square, asks Smith if he [Lambert] ever signed Dr T's certificate [Robert John Thornton (1768-1837) physician and writer on botany, angered several botanists in pursuit of completing his work "New Illustration of the Sexual System of Linnaeus"].