1957. Third Edition. 526 pages. Grey dust jacket over blue cloth covered boards with gilt. Pages remain clear with minimal tanning and foxing. Binding remains firm. Previous owner's inscription to front free end-paper. Boards have mild edge-wear with slight rubbing to surfaces. Mild crushing to spine ends. Book has a slight forward lean. Gilt lettering is darkened. Top edge of text block is dust marked. Unclipped jacket has moderate edge-wear with chips, tears and creasing. Moderate tanning to spine.