Former residence, Chester, could refer to either the county or the county town.
(1) John Harrower and E.M. Riley, ed., The Journal of John Harrower, An Indentured Servant in the Colony of Virginia, 1773-1776 (Williamsburg, Virginia: Distributed by Holt, Rinehart and Winston, New York, 1963), 167, quoting Treasury-Registers, Various-Weekly Emigration Returns, 1773-1774, The National Archives, Kew, England, T 47/9, 54-57.
(2) Robert A. Leath, "Servitude and Splendor: The Craftsmen and Carved Furniture of the Rappahannock River Valley, 1740 to 1780," The Magazine Antiques (May 2008), accessed 15 May 2009.