Has been unwell.

Thanks TCE for his descriptions [of specimens for Birds]. Has already expended a high proportion of Government grant on birds, but if TCE thinks engravings are needed, he shall have them. He may keep the bones.

CD has become a father.

CD regrets inconvenience caused by his having Royal Geographical Society’s copy of Krusenstern’s Atlas [de l’océan Pacifique (1824–7)]. Locates Sulphur Island from it.

Sends MS [of Coral reefs?] to be copied.

Remarks on his illness and treatment.

Discusses MS [of Coral reefs] and changes in his view of coral reefs since Journal of researches. Mentions C. G. Ehrenberg’s observations on coral reefs.

Writes to find whether the date of the event [JMH’s marriage?] has been fixed.

Has been unwell and does not yet feel up to work.

Sends his paper on earthquakes [(1840), Collected papers 1: 53–86]. Now sets less value on theoretical reasoning in geology than when he wrote it.

Answers a number of queries from Lyell concerning geography and geology of Chiloé Island and its relationship to the Cordilleras.

Asks about "perched rocks" on Jura and notes their relevance to Louis Agassiz’s theory. Discusses Agassiz’s view on Jura.

Mentions seeing Robert Brown.

Notes R. I. Murchison’s discovery of shells in central England.

Weakness of negative evidence.

Discusses the role of ice in determining the geological features of the Jura. Mentions view of Agassiz. Objects to idea of "a [sea of ice] carrying rocks". Notes Agassiz’s earlier view of "ice expanded in the line of the Great Swiss Valley". Comments on Pentlands.

Defends his theory [in "Parallel roads of Glen Roy" (1839), Collected papers 1: 87–137] against the view that the "roads" were formed by glacial action.

Discusses at length Louis Agassiz’s book [Études sur les glaciers (1840)] and Agassiz’s explanation of moraines. Defends his own theory of the importance of floating ice. Relates glacier theory to his own interpretation of Glen Roy.

Mentions a paper he is writing on South American boulders and till [Collected papers 1: 145–63].

Discusses various types of coral reefs on which he has been collecting notes. Views of C. G. Ehrenberg. His conception of the formation of Bermuda.

Pessimistic about the effect of his poor health on his scientific work.

Orders pot of soft spermaceti ointment.

CD is pleased with LJ’s introduction [to Fish]. He rejoices that he persuaded LJ to undertake this work.

Acknowledges Mrs H’s disappointing answer to his quest for a house in the country. Five miles from a railway station is "the length of my tether".

Discusses relationship of subsidence to the formation of coral reefs.

Discusses growth of various species of coral. Explains significance of dead reefs.

Describes meeting of the Council of the Geological Society; the controversy involving Edward Charlesworth.

Mentions conversations with William Lonsdale about Lonsdale’s work on corals and the financial support for his work.

Murchison’s views on glaciation in Wales.

Agassiz’s observations at Glen Roy.

Mentions preparing geological notes for press. Asks whether WHM still has some geological specimens he had examined for CD.

Urges WHM to attend important meeting of Geological Society on 3 December.

Asks for account.

Discusses delay of Reptiles by Thomas Bell. Asks them to inform R. B. Hinds of delay.

Comments on JSH’s botanical work with his parishioners. Lyell will be pleased that he has done some fossil botanical work.

Describes a Geological Society meeting about Edward Charlesworth’s complaints.

Sends notes on volcanic islands for LH to read and return.

[Letter could be an inaccurate contemporary copy to which the copyist interpolated details, or a forgery. The address "Down House Orpington Kent" occurs nowhere else.]