This set of approximately 450 pages, covering the period October 1870-January 1873, is a record of wage payments and payroll calculations. The weekly payroll sheets list workers, their rate of pay, hours worked, and weekly payments. Many of these payroll sheets are preceded by a calculation sheet that provides a weekly analysis of labor costs for specific jobs. Beginning in August 1871, the payroll sheets include the signature of the worker on the line recording his weekly hours and pay.