1989. Eleventh Edition. 418 pages. No dust jacket. Green cloth. Contains black and white illustrations throughout. Pages remain bright and clear with minimal tanning and foxing. Pencil inscription to front free endpaper. Thumb-marking present. Light creasing to gutter. Binding remains firm. Boards have moderate edge-wear with bumping to corners and rubbing to surfaces. Visible crushing to spine ends. Noticeable tanning to spine and edges. Light marks to boards.