1957. Revised Edition. 327 pages. Plain dust jacket over blue cloth covered boards with silver lettering. Pages remain clear with minimal tanning and foxing. Previous owner's inscription to front free end-paper. Tape marks to end papers. Some occasional mild cracking to gutters throughout, binding remains reasonably firm. Boards have mild edge-wear with slight rubbing to surfaces. Mild crushing to spine ends. Gilt lettering is bright and clear. Unclipped jacket has light edge-wear with tears and creasing.