In the second edition of the Journal the philosopher showed signs of considerable advance (pp. 174-5). The effect of changed conditions is further developed. The checks to indefinite multiplication are insisted on, while the tendency of every species to increase geometrically is clearly pointed out. In the place of the former concluding sentence we find the following: "To admit that species generally become rare before they become extinct--to feel no surprise at the comparative rarity of one species with another, and yet to call in some extraordinary agent and to marvel greatly when a species ceases to exist, appears to me much the same as to admit that sickness in the individual is the prelude to death--to feel no surprise at sickness--but when the sick man dies, to wonder, and to believe that he died through violence." The continental regions of South America did not supply the sole food for the reflections of the young naturalist during this period. An intervening visit had been paid, in December, 1832, and January, 1833, to Tierra del Fuego, and the natives were most carefully observed. He was greatly struck by their low condition; "one can hardly make oneself believe they are fellow creatures, and inhabitants of the same world." Yet these abject people have been infinitely raised since that period by missionaries, and Darwin, hearing of this success, which he termed wonderful, sent a donation to the South American Missionary Society. The Falkland Islands were explored both in 1833 and 1834, and the Straits of Magellan were carefully examined, and many valuable geological facts recorded. The southern portion of the continent was at last quitted for Chili, Valparaiso being reached on July 23, 1834. After Tierra del Fuego this was a delightful change, and here Darwin found an old schoolfellow and friend, Mr. Richard Corfield, who entertained him hospitably during his stay in Chili. Various expeditions to the Andes, to Santiago, to gold mines and copper mines, supplied abundant objects of curiosity and science, as well as varied visions of beauty; but the fatigues undergone had to be paid for by a month's illness at Valparaiso, during which Mr. Corfield's kindness was unremitting. The large island of Chiloe was visited in November, and its climate even in summer proved wretched, reminding one of some parts of the Hebrides, a week without torrents of rain being wonderful. Castro, the almost deserted Spanish capital, could not furnish, even among hundreds of inhabitants, a pound of sugar or an ordinary knife. No one possessed either a watch or a clock, and the church bell was rung by guess by an old man who was supposed to have the best notion of time.