1966. Sixth Edition. 416 pages. No dust jacket. Yellow cloth covered boards with gilt. Pages have mild tanning and foxing throughout, moderate at end-papers, paste-downs 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. Cloth has minor damp and dust stains. Mild crushing to spine ends. Book has a slight forward lean. Gilt lettering is bright and clear.