[It includes some surnames, as well as subjects.]
The number given refers to the section, then the chart within that section, e.g. 1.7 Archibald is Section 1 (or I) (Start Here), then Chart #7 (A Completed Ancestry Chart); also 6.7, One Family, or Two Families, is Section 6 (or VI) (Problem Solving), then Chart #7 (One Family, or Two).
Key
I = 1
II = 2
III = 3
IV = 4
V = 5
VI = 6
VII = 7
VIII = 8