1966. Thirtieth Impression. 223 pages. Illustrated dust jacket over blue cloth covered boards. Pages remain clear with minimal tanning and foxing, mild to end-papers and text-block edges. Minor pencil marking to front free end-paper. Binding remains firm. Boards have mild edge-wear with slight rubbing to surfaces. Cloth has minor damp and dust stains. Mild crushing to spine ends. Book has a slight forward lean. Moderate tanning to spine. Clipped jacket has moderate edge-wear with chips, tears and creasing. Mild staining.