1950. Seventh Edition, Revised. 297 pages. Illustrated dust jacket over red cloth covered boards with gilt. Pages remain clear with minimal tanning and foxing, mild to end-papers and text-block edges. Previous owner's inscription to front free end-paper. Binding remains 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 darkened. Unclipped jacket has light edge-wear with tears and creasing. Moderate sunning to spine.