1945. Fourth Edition. 259 pages. Plain dust jacket over blue cloth covered boards. Pages remain clear with minimal tanning and foxing, mild to end-papers and text-block edges. Binding remains firm. Boards have moderate edge-wear with bumping to corners and rubbing to surfaces. Cloth has minor damp and dust stains. Bleaching to spine front joint.Mild crushing to spine ends. Book has a slight forward lean. Unclipped jacket has light edge-wear with tears and creasing. Moderate sunning to spine.