1965. Sixth Printing. 160 pages. No dust jacket. Blue cloth. Contains black and white illustrations throughout. Pages remain bright and clear with minimal tanning and foxing. Thumb-marking present. Visible creasing to gutter. Boards have moderate edge-wear with bumping to corners and rubbing to surfaces. Visible crushing to spine ends. Notable tanning to spine and edges. Water staining to boards. Marks overall. Textblock is shaky.