Describes Patagonia and its inhabitants.

Writes of his pleasure in geology.

Predicts that Falklands will become an "important halting place". Outlines Beagle’s future itinerary.

In the past six months he has done much geology and natural history. His geological pursuits are a source of high pleasure. Has lately determined to work chiefly on corals.

Spent three weeks going up the Santa Cruz with a party; they ran out of provisions 20 miles from the Cordilleras. Winter at present prevents his doing much natural history.

Thanks for her letter of March, which gave him his first explanation of the interest in the [Megatherium] head he had sent.

Wants E. A. Darwin to tell William Clift not to remove numbers or markers on any specimens. The British Museum has first claim on any of his specimens; CD cannot at present say where any should go.

Recounts his trip [from Valparaiso] to Santiago. His meeting with Claude Gay, Thomas Sutcliffe, and others. Geology of tour uninteresting.

Became ill two weeks before on his return from Santiago after an interesting trip and some geology – though snow kept him out of the Andes. FitzRoy has had to sell the schooner; he was discouraged by the Admiralty, and the expense was too much for him to bear personally.

CD has recovered from his illness.

Fatigue and depression had almost decided Captain FitzRoy to turn over his command, but he was dissuaded.

Beagle will now go no further south than Cape Tres Montes and will finish survey in five months.

CD experiences his first earthquake.

Definite plans now to leave Valparaiso 1 June and to arrive in Sydney in January; then Cape of Good Hope and home in September 1836.

Describes Concepción after earthquake.

Will cross the Cordilleras. Hopes snow will hold off.

His trip across the Andes and back was his most successful excursion: can clearly demonstate that the western part of the double line of mountains is much older, with fossil shells at 12000ft; the eastern line may be as modern as the Patagonian plains. If proved, this is an important fact in the theory of the formation of the world. Has found petrified trees.

Slow and tedious trip through miserable country, but geology prospers, and CD will have a good general idea of the structure of Chile by the time he leaves the country. Will send a last large cargo of specimens to Henslow.

Describes his trip from Coquimbo to Copiapò, where he rejoined the Beagle – a hard and wearisome journey, but geologically interesting.

FitzRoy piloted the [Blonde] to rescue crew of wrecked Challenger.

CD has received letters that were missing, and others; for ten months there will be none to or from him.

Memorandum of geological instructions to guide ABU during a voyage of [Constitucion] to survey the coast of Peru.

Living quietly on the ship and eating good food has been good for him. He longs for home. Peru is in a miserable state.

At sea 25 days from Galapagos to Tahiti, where they stayed ten days. It was delightful. Then three weeks to New Zealand, where they will be for ten days.

Convinced of high merit of missionaries.

Dislikes Augustus Earle’s book.

CD’s impressions of Sydney and of FitzRoy’s character and temperament.

All prefer Hobart Town and its society to Sydney. CD’s view on emigration to colonies. All on board are homesick.

Keeling Islands, his first coral lagoons; he has been occupied with subject of coral formation for six months.

Very busy at sea rewriting old geological notes. Has difficulties with writing.

FitzRoy has proposed joint account of the journey, combining CD’s journal with his own.

Looks forward with anxiety to Henslow’s reaction to the geological notes.

Will call on Sir J. Herschel, then take short trip in the African desert.

Horrified at the publication of "the little book of extracts" from his letters to Henslow ["Letters to Professor Henslow" (1835), Collected papers 1: 3–16].

In five days of geologising on St Helena, he found that the shells on high land had been mistakenly identified as seashells. They are land shells, but of species no longer living.

Can think of nothing but the return to England and his family.

Beagle is again in Brazil because of need to check on "singular disagreements in the Longitudes".

Pleased by Sedgwick’s praise.

Happily home, he sends thanks to his "first Lord of the Admiralty". Will visit Maer in two or three weeks.