1959. Twelfth Edition. 619 pages. Illustrated dust jacket over green cloth covered boards with gilt. Pages are moderately tanned and occasionally foxed throughout. Previous owner's inscription to front free end-paper. Thumb-marking present. Binding remains firm. Boards have mild edge-wear with slight rubbing to surfaces. Mild crushing to spine ends. Book has a slight forward lean. Gilt lettering is bright and clear. Unclipped jacket has moderate edge-wear with chips, tears and creasing. Moderate tanning to spine.