[187] Dr. Gardner, who looked at these things with the eye of a botanist, says that near Rio de Janeiro the heat and moisture are sufficient to compensate even the poorest soil; so that ‘rocks, on which scarcely a trace of earth is to be observed, are covered with vellozias, tillandsias, melastomaceæ, cacti, orchideæ, and ferns, and all in the vigour of life.’ Gardner's Travels in Brazil, p. 9. See also on this combination, Walsh's Brazil, vol. ii. pp. 297, 298, a curious description of the rainy season: ‘For eight or nine hours a day, during some weeks, I never had a dry shirt on me; and the clothes I divested myself of at night, I put on quite wet in the morning. When it did not rain, which was very rare, there shone out in some places a burning sun; and we went smoking along, the wet exhaling by the heat, as if we were dissolving into vapour.’

[188] On the natural history of Brazil, I have compared a few notices in Swainson's Geography of Animals, pp. 75–87, with Cuvier, Règne Animal, vol. i. p. 460, vol. ii. pp. 28, 65, 66, 89, vol. iv. pp. 51, 75, 258, 320, 394, 485, 561, vol. v. pp. 40, 195, 272, 334, 553; Azara, Amérique Méridionale, vol. i. pp. 244–388, and the greater part of vols. iii. and iv.; Winckler, Geschichte der Botanik, pp. 378, 576–578; Southey's History of Brazil, vol. i. p. 27, vol. iii. pp. 315, 823; Gardner's Brazil, pp. 18, 32–34, 41–44, 131, 330; Spix and Martius's Brazil, vol. i. pp. 207–209, 238–248, vol. ii. pp. 131, 160–163. And as to the forests, which are among the wonders of the world, Somerville's Physical Geog. vol. ii. pp. 204–206; Prichard's Physical History, vol. v. p. 497; Darwin's Journal, pp. 11, 24; Walsh's Brazil, vol. i. p. 145, vol. ii. pp. 29, 30, 253.

[189] This extraordinary richness has excited the astonishment of all who have seen it. Mr. Walsh, who had travelled in some very fertile countries, mentions ‘the exceeding fecundity of nature which characterizes Brazil.’ Walsh's Brazil, vol. ii. p. 19. And a very eminent naturalist, Mr. Darwin, says (Journal, p. 29), ‘In England, any person fond of natural history enjoys in his walks a great advantage, by always having something to attract his attention; but in these fertile climates, teeming with life, the attractions are so numerous that he is scarcely able to walk at all.’

[190] Azara (Amérique Méridionale, vol. ii. pp. 1–168) gives a curious, but occasionally a disgusting account of the savage natives in that part of Brazil south of 16°, to which his observations were limited. And as to the inhabitants of other parts, see Henderson's History of Brazil, pp. 28, 29, 107, 173, 248, 315, 473; M'Culloh's Researches concerning America, p. 77; and the more recent account of Dr. Martius, in Journal of Geograph. Society, vol. ii. pp. 191–199. Even in 1817, it was rare to see a native in Rio de Janeiro (Spix and Martius's Travels in Brazil, vol. i. p. 142); and Dr. Gardner (Travels in Brazil, pp. 61, 62) says, that ‘more than one nation of Indians in Brazil’ have returned to that savage life from which they had apparently been reclaimed.

[191] Sir C. Lyell (Principles of Geology, p. 682) notices ‘the incredible number of insects which lay waste the crops in Brazil;’ and Mr. Swainson, who had travelled in that country, says ‘The red ants of Brazil are so destructive, and at the same time so prolific, that they frequently dispute possession of the ground with the husbandman, defy all his skill to extirpate their colonies, and fairly compel him to leave his fields uncultivated.’ Swainson on the Geography and Classification of Animals, p. 87. See more about these insects in Darwin's Journal, pp. 37–43; Southey's History of Brazil, vol. i. pp. 144, 256, 333–335, 343, vol. ii. pp. 365, 642, vol. iii. p. 876; Spix and Martius's Travels in Brazil, vol. i. p. 259, vol. ii. p. 117; Cuvier, Règne Animal, vol. iv. p. 320.

[192] The cultivated land is estimated at from 1½ to 2 per cent. See M'Culloch's Geog. Dict. 1849, vol. i. p. 430.

[193] During the present century, the population of Brazil has been differently stated at different times; the highest computation being 7,000,000, and the lowest 4,000,000. Comp. Humboldt, Nouv. Espagne, vol. ii. p. 855; Gardner's Brazil, p. 12; M'Culloch's Geog. Dict. 1849, vol. i. pp. 430, 434. Mr. Walsh describes Brazil as ‘abounding in lands of the most exuberant fertility, but nearly destitute of inhabitants.’ Walsh's Brazil, vol. i. p. 248. This was in 1828 and 1829, since which the European population has increased; but, on the whole, 6,000,000 seems to be a fair estimate of what can only be known approximatively. In Alison's History, vol. x. p. 229, the number given is 5,000,000; but the area also is rather understated.

[194] Vidaca being the most southerly point of the present Peruvian coast; though the conquests of Peru, incorporated with the empire, extended far into Chili, and within a few degrees of Patagonia. In regard to Mexico, the northern limit of the empire was 21°, on the Atlantic coast, and 19° on the Pacific. Prescott's History of Mexico, vol. i. p. 2.

[195] A question has been raised as to the Asiatic origin of maize: Reynier, Economie des Arabes, pp. 94, 95. But later and more careful researches seem to have ascertained beyond much doubt that it was unknown before America was discovered. Compare Meyen's Geography of Plants, pp. 44, 303, 304; Walckenaer's note in Azara, Amérique Méridionale, vol. i. p. 149; Cuvier, Progrès des Sciences Naturelles, vol. ii. p. 354; Cuvier, Eloges Historiques, vol. ii. p. 178; Loudon's Encyclopædia of Agriculture, p. 829; M'Culloch's Dict. of Commerce, 1849, p. 831. The casual notices of maize by Ixtlilxochitl, the native Mexican historian, show its general use as an article of food before the arrival of the Spaniards: see Ixtlilxochitl, Histoire des Chichimèques, vol. i. pp. 53, 64, 240, vol. ii. p. 19.

[196] ‘Maize, indeed, grows to the height of 7,200 feet above the level of the sea, but only predominates between 3,000 and 6,000 of elevation.' Lindley's Vegetable Kingdom, 1847, p. 112. This refers to the tropical parts of South America; but the Zea Mais is said to have been raised on the slopes of the Pyrenees ‘at an elevation of 3,000 to 4,000 feet.’ See Austen on the Forty Days' Maize, in Report of Brit. Assoc. for 1849, Trans. of Sec. p. 68.