Chiefly grids that are structured as follows: right-hand page: 5 long lines over 16 columns divided into sets of 2, 1, 4, 9 columns with columns divided into rows of 1 header row and three sets of 5 rows; left-hand page: 5 long lines over 18 columns divided into sets of 4, 6, 5, 1, 2 columns with columns divided into rows of 1 header row, three sets of 5 rows. All grids border ruled with heavier rules dividing the sets of columns and rows.
