1966. Fourth Edition. 416 pages. Illustrative jacket over black cloth. Contains black and white illustrations throughout. Pages remain bright and clear with minimal tanning and foxing. Pencil inscription to front free endpaper. Some creasing to gutter. Boards have mild edge-wear with slight rubbing to surfaces. Light crushing to spine ends. Minor tanning to spine and edges. Minimal marks to boards. Textblock is shaky. Unclipped jacket has moderate edgewear with chips, tears and creasing. Some tanning to spine. Noticeable rubbing to surfaces. Scuffing to edges.