1971. Sixth Printing. 206 pages. Green paperback. Contains black and white illustrations throughout. Pages remain bright and clear with minimal tanning and foxing. Prominent water staining to reverse of covers and last page. Pencil inscription to half title page. Thumb-marking present. Underlining to pages throughout. Pulling to covers. Paper covers have moderate edge-wear with curling to corners and rubbing to surfaces. Visible tanning to spine and edges. Noticeable scuffing to edges. Some tearing to spine ends. Brown marks overall.