1962. Fourth Edition, Revised. 192 pages. Blue cloth. Contains black and white illustrations throughout. Pages remain bright and clear with minimal tanning and foxing. Previous owner's inscription to front free endpaper. Scuffing to front pastedown. Thumb-marking present. Minor dog-eared corners. Boards have moderate edge-wear with bumping to corners and rubbing to surfaces. Visible crushing to spine ends. Noticeable tanning to spine and edges. Bubbling to front board. Black marks and scratches to boards. Textblock is shaky.