Photocopy of: Plan of the borough of Columbia from original resources / by E.W. Goerke, Philadelphia, Pa. : Edward B. Eckman & Frank J. Haberstroh, 1908.
"The original map from which these boundaries were drawn, was drawn for, and delivered by Samuel Wright on July 25, 1788, to John Hubley, Esquire, for safe keeping. Sworn by Hubley, April 22, 1812."