[8] Prof. O. Heer, ‘Die Pflanzen der Pfahlbauten, 1866, aus dem Neujahr. Naturforsch. Geselschaft,’ 1866; and Dr. H. Christ in Rutimeyer’s ‘Die Fauna der Pfahlbauten,’ 1861, s. 226.
[9] ‘Travels,’ p. 535. Du Chaillu, ‘Adventures in Equatorial Africa,’ 1861, p. 445.
[10] In Tierra del Fuego the spot where wigwams had formerly stood could be distinguished at a great distance by the bright green tint of the native vegetation.
[11] ‘American Acad. of Arts and Sciences,’ April 10th, 1860, p. 413. Downing, ‘The Fruits of America,’ 1845, p. 261.
[12] ‘Journals of Expeditions in Australia,’ 1841, vol. ii. p. 292.
[13] Darwin’s ‘Journal of Researches,’ 1845, p. 215.
[14] De Candolle has tabulated the facts in the most interesting manner in his ‘Géographie Bot.,’ p. 986.
[15] ‘Flora of Australia,’ Introduction, p. 110.
[16] For Canada, see J. Cartier’s Voyage in 1534; for Florida, see Narvaez and Ferdinand de Soto’s Voyages. As I have consulted these and other old Voyages in more than one general collection of Voyages, I do not give precise references to the pages. See also, for several references Asa Gray, in the ‘American Journal of Science,’ vol. xxiv. Nov. 1857, p. 441. For the traditions of the natives of New Zealand see Crawfurd’s ‘Grammar and Dict. of the Malay Language,’ 1852, p. 260.
[17] See, for example, Mr. Hewett C. Watson’s remarks on our wild plums and cherries and crabs: ‘Cybele Britannica,’ vol. i. pp. 330, 334, etc. Van Mons (in his ‘Arbres Fruitiers,’ 1835, tom. i. p. 444) declares that he has found the types of all our cultivated varieties in wild seedlings, but then he looks on these seedlings as so many aboriginal stocks.