1921. Fourth Edition, Revised. 68 pages. Pictorial paper covered boards. Pages are lightly tanned and foxed throughout. Cracking to gutters of a few pages with exposed binding. Light thumb-marking present. Cracking to hinges with covers slightly coming away from text-block. Binding is slightly shaky. Paper cover has moderate edge wear with scuffing to edges and creasing. Notable splits to joints, with pieces of spine strip missing and very loose. Book has rolled spine. Moderate tanning to spine and edges. Dark rubbing and water staining to surfaces with curling to corners. Blue pencil marking to front cover.