The Shadow of a Dream: Economic Life and Death in the South Carolina Low Country, 1670-1920 (Oxford University Press, 1989), p. 75, and per capita income (high value) from Alice Hanson Jones,

Wealth of a Nation To Be: The American Colonies on the Eve of the Revolution (Arno Press, 1980), p. 63.

farmers on the frontier buying consumer goods: McCusker and Mennard,

British North America , pp. 175, 180-1.

half the land in the valley of Mexico: Charles Gibson,

The Aztecs under Spanish Rule: A History of the Indians of the Valley of Mexico, 1519-1810 (Stanford University Press, 1964), p. 277.

British Columbia seal skins: Alexander von Humboldt,

Spain , tr. John Black (London, 1822), Vol. II, pp. 311, 320.

road from Vera Cruz to Mexico City: von Humboldt,

, Vol. IV, pp. 8-9.

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