This fonds consists of two "Counting Copy Books" which set down the basic rules of arithmetic and provide examples for solving, including reduction, the rule of three, compound interest, rebate or discount, equation of payments, barter, and profit and loss. Under "Reduction" can be found listings of units of: Avoir dupois Weight, Troy Weight, Time, Cloth Measure, Long Measure, Apothecary's Weight, Dry Measure,Winchester Measure, and Wine Measure. Some references in the back of Robert Willan's book record payments for shearing in 1819 and1820. An inscription on Robert's book reads "Wm. Marshall, Aughton near Lancaster" [teacher?]. Another inscription on the last page of Edwards book reads "Thomas M. Willan, South Monaghan." A loose slip of paper in Edward's book reads "Robert Willan, Challan Hall, Febery 14, 1819."