5 Dates of migration for the founders of 72 families in Virginia’s high elite as follows: 1607-19, 3; 1620-29, 4; 1630-39, 7; 1640-49, 8; 1650-59, 29; 1660-69, 11; 1670-79, 4; 1680-89, 4; 1690 and after, 2. These data refer to holders of major offices, 1680-1776. Sources include standard genealogical materials indexed in Swem, Virginia Historical Index, and English materials in English county record offices; also Bruce, Social Life of Virginia, 39-99; Bailyn, “Politics and Social Structure in Virginia,” 90-115; Douglas Southall Freeman, George Washington (7 vols., New York, 1948-57), I, 15, appendix 1-4; Louis Morton, Robert Carter of Nomini Hall (Williamsburg, 1945), 3; Nell M. Nugent, Cavaliers and Pioneers (Richmond, 1934); William G. and Mary N. Stanard, The Colonial Virginia Register (Albany, 1902).
6 Berkeley, A Discourse and View of Virginia, 3.
7 Joan Thirsk, “Younger Sons in the Seventeenth Century,” H 54 (1969), 358-77.