1950. Fifth Edition. 656 pages. No dust jacket. Blue cloth covered boards with gilt lettering. Pages remain clear with minimal tanning and foxing, mild to end-papers and text-block edges. Plates are moderately tanned with some foxing. Binding remains firm. Boards have moderate edge-wear with bumping to corners and rubbing to surfaces. Cloth has minor damp and dust stains. Mild crushing to spine ends. Book has a slight forward lean. Gilt lettering is bright and clear.