In the course of the voyage the following countries and islands were visited in the order given:--The Cape de Verde Islands, St. Paul’s Rocks, Fernando Noronha, South America (including the Galapagos Archipelago, the Falkland Islands, and Tierra del Fuego), Tahiti, New Zealand, Australia, Tasmania, Keeling Island, Maldive Coral Atolls, Mauritius, St. Helena, Ascension. Brazil was then visited again for a short time, the _Beagle_ touching at the Cape de Verde Islands and the Azores on the voyage home.
Darwin says, concerning the intellectual effect of his work during the voyage:--
“That my mind became developed through my pursuits during the voyage is rendered probable by a remark made by my father, who was the most acute observer whom I ever saw, of a sceptical disposition, and far from being a believer in phrenology; for on first seeing me after the voyage he turned round to my sisters, and exclaimed, ‘Why the shape of his head is quite altered!’” (_l. c._, pp. 63, 64).
CAMBRIDGE--LONDON--WORK UPON THE COLLECTIONS--MARRIAGE--GEOLOGICAL WORK--JOURNAL OF THE VOYAGE--CORAL REEFS--FIRST RECORDED THOUGHTS ON EVOLUTION (1837–42).
Darwin reached England October 2nd, 1836, and was home at Shrewsbury October 5th (according to his Letters; the 4th is the date given by Francis Darwin in the “Life and Letters”). The two years and three months which followed he describes as the most active ones he ever spent. After visiting his family, he stayed three months in Cambridge, working at his collection of rocks, writing his “Naturalist’s Voyage,” and one or two scientific papers. He then (March 7th, 1837) took lodgings in 36, Great Marlborough Street, London, where he remained until his marriage, January 29th, 1839. The apathy of scientific men--even those in charge of museums--caused him much depression, and he found great difficulty in getting specialists to work out his collections, although the botanists seem to have been keener than the zoologists.
The commencement of his London residence is of the deepest interest, as the time at which he began to reflect seriously on the origin of species. Thus he says in the “Autobiography”:--“In July I opened my first note-book for facts in relation to the Origin of Species, about which I had long reflected, and never ceased working for the next twenty years.” Furthermore, his pocket-book for 1837 contained the words:--“In July opened first note-book on Transmutation of Species. Had been greatly struck from about the month of previous March” (he was then just over twenty-eight years old) “on character of South American fossils, and species on Galapagos Archipelago. These facts (especially latter) origin of all my views.” It is, perhaps, worth while to explain in greater detail the nature of this evidence which appealed so strongly to Darwin’s mind. The Edentata (sloths, ant-eaters, armadilloes, etc.) have their metropolis in South America, and in the later geological formations of this country the skeletons of gigantic extinct animals of the same order (Megatherium, Mylodon, Glyptodon, etc.) are found; and Darwin was doubtless all the more impressed by discovering such remains for himself. In his “Autobiography” he says: “During the voyage of the _Beagle_ I had been deeply impressed by discovering in the Pampean formation great fossil animals covered with armour like that on existing armadilloes;...”