[1999] De Naidaillac, in his work entitled Les Premiers Hommes et les Temps Préhistoriques, gives briefly the sum of our knowledge of these migrations of the ancient peoples of America in general. See especially vol. ii. chap. 9.
[2000] De Naidaillac, ii. p. 69, who quotes Bancroft, The Native Races of the Pacific States.
[2001] Willkomm and Lange., Prodr. Fl. Hisp., iii. p. 872.
[2002] Boissier, Fl. Orient.; Tchihatcheff, Asie Mineure; Ledebour, Fl. Ross., and others.
[2003] Heer, Pflanzen der Pfahlbauten, p. 32, figs. 65, 66.
[2004] De Lanessan, in his translation from Flückiger and Hanbury, Histoire des Drogues d’Origine Végétale, i. p. 129.
[2005] Dioscorides, Hist. Plant., lib. iv. c. 65.
[2006] Pliny, Hist. Plant., lib. xx. c. 18.
[2007] Unger, Die Pflanze als Errerungs und Betaübungsmittel, p. 47; Die Pflanzen des Alten Ægyptens, i. p. 50.
[2008] Ebn Baithar, German trans., i. p. 64.