1968. Third Edition. 226 pages. Illustrated dust jacket over blue cloth covered boards with gilt. Pages remain clear with minimal tanning and foxing. 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. 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.