Figure 18  Account of William Walker with John Mercer, John Mercer Account Book, 1741–1750, fol. 36. (Courtesy, Mercer Museum, Bucks County Historical Society.) This account records the May 1749 charges for carving the Mercer-Walker chair illustrated in fig. 19 and Mercer’s subsequent sale of the set of fourteen chairs back to William Walker in July 1749.