| Description | The first part of the book has designs based on the letters of the alphabet, linked to numbers, and divided into sections dated Spring and Fall 1818 to Spring 1827 [? suggesting American oirigin] The scond part comprises specimen calculations to work out rates of interest. There are refernces to Windsor soap, lead pencils, crayons, Banbury locks, silver goods, glazier diamonds, sickles, corkscrews, Warrington files, and many times to Waldrons |