1957. Tenth Printing. 336 pages. Brown dust jacket over blue cloth boards with black lettering to spine and front. Binding remains firm. Crinkling to pages at gutters. Pages remain bright and clear with minimal tanning. Annotations and marginalia to pages throughout. Boards have mild edge wear with slight rubbing to surfaces. There is bumping to corners and crushing to spine ends. Tanning to spine and edges causing discolouration. Lettering is darkened. Boards are bowed. Book has a slight forward lean. Clipped jacket has heavy edge wear with some areas of loss, heavy chips, tears and creasing. Tanning to spine and edges causing discolouration.