[1989] Rumphius, Amboin., vol. v. p. 525.
[1990] Malte-Brun, Géographie, i. p. 493.
[1991] A plant engraved on an ancient weapon which Siebold had taken for maize is a sorghum, according to Rein, quoted by Wittmack, Ueber Antiken Maïs.
[1992] See Martius, Beiträge zur Ethnographie Amerikas, p. 127.
[1993] Darwin, Var. of Plants and Anim. under Domest., i. p. 320.
[1994] A. de Saint-Hilaire, Ann. Sc. Nat., xvi. p. 143.
[1995] Lindley, Journ. of the Hortic. Soc., i. p. 114.
[1996] I quote these facts from Wittmack, Ueber Antiken Maïs aus Nord und Sud Amerika, p. 87, in Berlin Anthropol. Ges., Nov. 10, 1879.
[1997] Rochebrune, Recherches Ethnographiques sur les Sépultures Péruviennes d’Ancon, from an extract by Wittmack in Uhlworm, Bot. Central-Blatt., 1880, p. 1633, where it may be seen that the burial-ground was used before and after the discovery of America.
[1998] Sagot, Cult. des Céréales de la Guyane Franç. (Journ. de la Soc. Centr. d’Hortic. de France, 1872, p. 94).