Twelfth Edition. 222 pages. Illustrated dust jacket over blue cloth covered boards. Pages have mild tanning and foxing throughout, moderate at end-papers, paste-downs and text-block edges. Previous owner's inscription to front free end-paper. Some occasional mild cracking to gutters throughout however binding remains reasonably firm. Boards have moderate edge-wear with bumping to corners and rubbing to surfaces. Cloth has minor damp and dust stains. Mild crushing to spine ends. Book has a slight forward lean. Sunning to spine. Unclipped jacket has moderate edge-wear with chips, tears and creasing.