The Account books series includes information on customers, raw materials, and suppliers. Wage books include production records and tabulations of wages for weavers, time hands, spinners, shawl twisters, and wool sorters. There is some information on store accounts.

Volume 1 covers the Brandywine flannel mill of John Bancroft (1774-1852). John Bancroft used volumes 2, 3, and 4 to record his business as a lumber merchant, furniture maker, and woodworker in Manchester, England. He then brought them to America and used them to record his woolen mill business in Upper Providence Township, filling another twenty-seven volumes in this endeavor. Volumes 32 and 33 deal with Joseph Bancroft's Rockford cotton mills near Wilmington, and Volume 34 is a rent book (1895-1900) for workers' houses in Wilmington owned by Joseph Bancroft & Sons Company.