[Aylmer Bourke] Lambert in "raptures" over [Augustin Pyramus] de Candolle's new work "Prodromus syst[ematis] nat[uralis]" though Cullum disappointed Candolle is unlikely to continue his "Systema Vegetabile".

Observations on changes of chemical names of medicines in the "London Pharmacopoeia" and other: 'Elettaria' has changed to 'Matonia', as recommended by Smith'; in the "Dispensatory" "cantharides" has reverted from "lyttae"; the three species of 'Arichona', the 'cordifolia', 'lancifolia', and 'oblongifolia' continued; and camphor still said to be produce of 'Laurus camphora' though [Philip] Miller told him that the best camphor comes from very large trees timber trees at Sumatra, wonders if the Dutch controllers of the trade make it from the 'Laurus' or undersized trees.

Lord [John Rous, 1st Earl of] Stradbroke [(1750-1827)] sent him specimens of the insects killing his Scotch firs for identification; thinks them 'Sirex juveneus' and reminded that some years ago several oaks were cut down in Mr Port's garden plantation at Ham, Derbyshire, because of boring 'Sirex gigas' hornets. Does not think 'Sirex' are labelled a pest of 'Pinus sylvestris' in Lambert's "[A description of the genus] Pinus". Offers to send bark specimens of Stradbroke's trees to Linnean Society.

Thanks for the two volumes of Smith's "English Flora", gratified by Smith's address to him. Intends to come to London in April.

Disappointed Smith was not at 6 May Linnean Society meeting. Bishop of Carlisle [Samuel Goodenough] was also absent because of gout and [Aylmer Bourke] Lambert infrequently attends on account of Mrs [Catherine] Lambert's ill health. Laid bark of Lord [John Rous, 1st Earl of] Stradbroke's [(1750-1827)] 'Sirex juvenus' damaged 'Pinus sylvestris' trees on table at Linnean Society. Invites Smith to breakfast with them and General [Thomas] Hardwicke when Smith comes for anniversary meeting. Delighted by reports of new arrival at Holkham Hall [birth of a son to Thomas William Coke].

Left London early for Lady Cullum's health. Missed Prince Leopold dining with the Linnean Club but [Aylmer Bourke] Lambert, Bishop of Carlisle [Samuel Goodenough], Sir Claude Scott [(1742-1830)], Mr Colebrooke, [William George] Maton, and Sir Benjamin Hobhouse [(1757-1831), politician] attended. Lambert's state of mind too unsettled for him to write to anyone unless absolutely obliged. Hopes Lambert sent Smith the continuation of his "[A description of the genus] Pinus" work. This summer possibly going to Ramsgate and Margate, [Kent], or Paris by steam vessel, and plans to visit Smith in Saxmundham, [Suffolk].

Sorry Sir James [Edward Smith] could not visit him in Bury following his own visit to Smith in Saxmundham; hopes his health is recovering. Lady Cullum's trip to Brighton did not revive her health; she is now taking ass's milk to prevent "an irregular & teazing intermittent fever". His son and daughter-in-law staying in Pisa so she can treated by the "celebrated Dr Vacca", but as the baths of Barèges, [France], and Sorrento, [Italy], doubts the worth of this. Death of Sir William Watson [(1744-1824), physician and naturalist]; recalls that when he stayed in Bath he would meet at Governor Pounal's house with Sir William, Dr Parry, [Thomas] Velley, [John] Stackhouse, Sir Thomas Frankland, Archbishop of York [William Markham (1719-1807)], and Dr Falkner, reminded of death of Sir Joseph Banks and the loss of a place where so many friends would meet together.