Discusses construction of his 20-foot reflecting telescope, which he modeled after the 40-foot reflector at Slough. Discusses differences of gallery and asks for advice.

Pleased that JH supports CH's plans for her will. Worries about JH's safety at Puy de Dôme.

Studying the volcanoes of Auvergne; hopes to use his newly-created actinometer at the Puy de Dôme.

Comments on articles recently published on microscopy.

Geological remarks on the surrounding area and excursions made.

Has received the gift of books for which he is grateful. They have been placed in the library.

Thanks WT for bringing to JH Josef Fraunhofer's publications and Franz Gruithuisen's plates. Recounts JH's geologizing in France and JH's efforts to measure solar radiation.

In Brighton for a change of air as the gout in his knees and suppression of urine prevented him from returning to Rose Castle, [Carlisle], recovered a little after treatment from [William George] Maton and [Thomas] Copeland [(1781-1855), surgeon]. Has not attended any of his Societies and has no news since the death of Sir [Thomas] Stamford Raffles [(1781-1826), founder of Singapore]. Presumes the "S" in Smith's letter refers to [Richard] Salisbury. Admires Smith's "English Flora" and especially the work on the umbelliferae.

Disappointed by trip to Ramsgate, [Kent], and only stayed fourteen days; also visited Dover, [Kent], but too old to climb hills for 'Brassica oleracea'. Dr [Pelham] Warren [(1778-1835)] prescribed for Lady Cullum two grains of James's powder and two of rhubarb taken nightly, and neutral saline draughts. Attended Horticultural Society meeting; few in attendance but pines, grasses, peaches, and cherries dealt out. Called on a busy [Robert] Brown in Soho Square. Accusations against [Richard] Salisbury in the newspapers; he is to appear at the Old Bailey though Cullum imagines he will flee to Italy where his charges are "scarce reckoned any crime", informed he has resigned membership of Linnean, Royal, and Horticultural Societies. Thanks for plants of 'Lathyrus grandiflorus'. Comments on produce and prices at Covent Garden market produce, including gourds, Siberian crabs, elder berries, walnuts, and sloes; recalls when he importuned [James] Dickson to give an account of everything sold in the market with their names, uses, and prices.