On fossils ([Megatherium], etc.), plants, shells sent and new ones found; geological observations. Asks for help in understanding cleavage and planes of deposition.
A new species of ostrich. Cites differences in size, colour, nidification, and geographical distribution.
CD asks the time of shipment and vessel in which the [Megatherium] bones were conveyed.
Patagonia swarms with guanaco, but few other creatures.
Hopes to be able to draw up a tolerable sketch of the geology of the east side of S. America.
Saw Jemmy Button, who is married and will stay in Tierra del Fuego. Mentions Falkland uprising.
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.
Would welcome hearing Cambridge news. Impossible not to regret friends and pleasures in England, but
has much solid enjoyment and never-failing interest in geology. Tells of his first sight of a savage.
CD is excited by JSH’s high opinion of his collections.
Discusses his notes and some new discoveries. Summary of events since leaving Falklands.
Geology of Patagonia.
Corallines at Tierra del Fuego convince him of artificiality of arrangement of their families by Lamarck and Cuvier.
Geological expedition in Andes, ending with serious illness. Specimens being sent.
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.
CD is unwell.
FitzRoy has dispatched two casks of bones and stones, a box with "very valuable specimens", and a large jar.
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.
Sends two boxes of specimens and part of his "hum-drum letter-like" journal.
Congratulates WDF on his marriage,
reminisces about Cambridge and early entomology. Now neglects entomology for geology.
Describes Concepción after earthquake.
Hopes to cross Cordilleras before they leave South America in September.
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.
The termination of the voyage has been decided – September 1836.
The earthquake of Concepción.
His geological observations (since November). Can now prove both sides of the Andes have recently risen to considerable heights.
Zoological collection.
Plans to cross the Cordilleras.
Has just returned from crossing the Cordilleras. Geological observations of formations representing great epochs of violence which broke up the earth’s crust. Shells at over 12000 feet. Silicified trees in sandstone formations at great heights. Red snow and viviparous lizards. Botanical specimens.
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.
Expresses envy for WDF’s life as a clergyman.
Outlines homeward voyage; tells of his hope of seeing active volcanoes and Tertiary strata in Galapagos. Recommends geology to Fox. Discusses Lyell’s views; CD has become "a zealous disciple".