1968. Revised Edition. 456 pages. No dust jacket. Blue cloth. Contains black and white illustrations throughout. Pages remain bright and clear with minimal tanning and foxing. Heavier tanning to free endpapers. Previous owner's inscription to front pastedown. Thumb-marking present. Visible creasing to gutter. Boards have mild edge-wear with slight rubbing to surfaces. Light crushing to spine ends. Visible tanning to spine and edges. Water staining to boards. White marks to boards. Textblock is shaky.