Observations on the geology of Arabia.

Praises CD’s Journal of researches and comments on some of CD’s observations and conclusions. Considers volcanic activity and its effect on past climate and changes in climate over time. Discusses glacial phenomena. Believes the climate of the coast of Peru is modified by cold sea-currents.

Sends notes on soundings made on coral banks in the China Sea.

His recent geological observations.

Finds a difficulty with CD’s erratic block theory.

Presents the Smith, Elder & Co. account for the fourth number now published of the second part of the Zoology.

Hopes to publish volume on coral formations in a few months.

He and Emma live quietly, having given up parties.

Asks WDF if he remembers the Darwin family motto. He means to have a "seal solemnly engraved".

Urges JSH to describe Galapagos species in a paper on the flora of the islands.

Has been interested in geographical distribution and would be interested to have a paper by JSH on the general character of flora of Tierra del Fuego and Patagonia.

"I keep on steadily collecting every sort of fact which may throw light on the origin & variation of species."

Gratified by AvH’s letter.

Sends data on temperature of the sea in the Galapagos, South Pacific, and the Abrolhos Islands.

Asks if WHM would be interested in the meteorological observations of the Falkland Islands made by B. J. Sulivan on a recent survey. Such observations are rare and appear to CD to have many points of interest.

Encloses the Smith, Elder & Co. account for the fourth number now published of the third part of the Zoology.

Sends bird specimens for examination by TCE [for Birds].

Sends specimens of coralline with vermiform holes.

J. Allan’s observations of Aldabra and the Cormoros [see Coral reefs, p. 186] and news of his experiments on the growth of coral.

Comments on the discussion of erratic blocks in Journal of researches [pp. 619, 621–2].

Discusses CD’s religious doubts. Fears his work may lead him to discount what cannot be proved, and advises that there are some things which, "if true are likely to be above our comprehension" and "that there is a danger in giving up revelation".

Asks for volumes of F. W. Beechey’s work [Narrative of a voyage to the Pacific and Bering Strait (1831)] and Nautical magazine and an order on [John] Arrowsmith for atlas of Dumont d’Urville’s Voyage in the "Astrolabe".

His dinner with the Carlyles. "He is the best worth listening to of any man" – but CD cannot get up much admiration for Mrs C, partly because of her Scots accent, which makes her difficult to understand.

Emma is surprised how quickly CD has moved into the new house and understands his feeling of triumph. Wants him and Fanny [Mrs Hensleigh] Wedgwood to settle on hiring a cook.

Is reading Mansfield Park [Jane Austen (1814)], which she finds "very suitable".

Has been with the Lyells doing geology.

Is reading a biography of Sir W. Scott [J. G. Lockhart, Memoirs of the life of Sir Walter Scott (1837–8)]; also Mungo Park’s book [Travels (1799)].

Has hired a cook at fourteen guineas a year with tea and sugar.

Still rejoices in having found the house they like.

Thinks he might enjoy Jenny [Jane Welsh] Carlyle’s company more away from Carlyle "as she must have her full swing in talking".

Says the wedding must be fixed for the 29th instead of the 24th.

Hopes he will look better than on his last visit.

Glad to have his letter; supposes she will receive only two or three more from him in her life.

Thinks he should leave the curtains for her.

Discusses Mungo Park and Sir Walter Scott’s Life.

Comments on recent visit to Maer. Explains that his notion of happiness as quietness and solitude derives from Beagle experience. Hopes Emma will humanise him. Comments on marriage planned for Tuesday.

Describes recent visit by Lyell and his wife. Talked geology for half an hour "with poor Mrs Lyell sitting by". "I want practice in ill-treating the female sex."