1964. Fourth Edition. 131 pages. Blue dust jacket over brown cloth. Pages are lightly tanned and foxed throughout, heavier to endpapers and pastedowns. Occasional thumb-marking present. Previous owner's inscription to front free endpaper and pastedown. Binding is slightly shaky. Boards have mild edge wear with slight rubbing to surfaces. Crushing to spine ends with small splits and fraying to cloth. Mild sunning to spine and edges. Light staining to front board edge. Unclipped jacket has moderate edge wear with chips, tears and creasing. Moderate tanning to spine and edges. Dark rubbing and marking to surfaces, with scuffing to edges. Dark staining to rear panel.