Will travel with Smith to London if he intends to attend Linnean Society meeting of 1 March. Hopes Smith is not amongst those citizens of Norwich speculating in "rail-roads, gas companies &c". Has noticed promotion of horticultural societies, particularly one in Brighton, of which [Thomas Andrew] Knight and Joseph Sabine are to be made Honorary Members. His son and family at Pisa, doubts Mrs Cullum will ever see England again having gained no benefit from the waters of Barèges, [France], Sorrento, and Ischia, [Italy], though they intend to return home this summer.

Apologises for involving Smith in the misunderstandings over appointing a new Linnean Society Secretary; [James] Bicheno was surprised to hear he had apparently refused the position. Objects to [Edward] Barnard on the grounds that he is too close to [Joseph] Sabine, and if made Secretary he would act as [Alexander] Macleay did by being President in all but name. Goodenough objects to Sabine, his habit of provoking disorder in any Society he joins, as at the Athenaeum, and his ordering a committee to discuss a portrait of Macleay when he had no authority to do so. Had hoped for a Secretary no one objected to to be appointed. Believes Sabine is now the effectual manager of the Linnean Society which many will find unpalatable.

More about lodgings in London [see JG's 1825-2-14], and about books JG and JH have read [letter completed 1825-3-9].

Enclosing Dr [Robert Kaye] Greville's Highland mosses for Smith in his Norwich parcel. Encloses specimen of 'Hypnum trifarium' gathered on a Highland excursion; observations on its habitat. Hopes to make another excursion this summer.

Sending moss specimens he has lately described. Awaiting specimens of 'Hypnum alpestre' and 'H. trifariense' for his "Scottish work"; 'H. halleri' is engraved. Found 'Splachnum rugosum' of "English botany" on Ben Lawers; believes it distinct from 'S. vasculosum', which he is drawing at the moment. He and [George] Arnott have been applying Smith's "favourite maxim" in classifying the splachnoid mosses, in doing so have overturned much of the previous work by other authors; observations on the genus. Regrets calling the work a new arrangement.

Since last writing 'Senecio tenuifolius' has been added to flora of Scotland. [William Jackson] Hooker on his journey to London and Paris. Received letter from Revd Lewis de Schweinitz [(1780-1834), botanist] of Pennsylvannia, who has raised number of American fungi to 2000. Requests specimen of 'Daltonia splachnoides'.

EAD thinks it a pity if CD does not go to Cambridge, but it will be very pleasant for them to be together at Edinburgh, where they should go as soon as possible and read. EAD is getting "case-hardened" in anatomy.

Reports on some observations from JS's observatory near Paris and on his contacts with the Paris Observatory. Relays to JH a request from Alexander von Humboldt for barometric observations. Invites JH to visit.

Has recently discovered in Cumberland a rich vein of cobalt, which is mixed with iron. Would like his opinion whether these ores can be easily separated. Can send him a specimen if required.

No summary available.

Would like to borrow the drawing of Josef Fraunhofer's telescope. Has received an account of this telescope from Wilhelm Struve, which he is now translating. Regarding the miscarriage of the Memoirs for Struve.