3
See Humboldt's essay on the production of gold and silver in the Journal des Economistes for March, April and May, 1838.
4
See Humboldt's Essay on Precious Metals, ut antea—in note—in the American translation, given in vol. iii., of the Banker's Magazine, p. 509.
5
See Ranke: Fursten and Volker, vol. i., pp. 347, 355.
6
Pet. Mart. Epist. lib. xxix., No. 556, 23d January, 1516.