1950. Fourth Edition. 315 pages. No dust jacket. This is an ex-Library book. Blue cloth with gilt. Ex-Library copy, with expected inserts, stamps and inscriptions. Rebound. Pages remain clear with minimal tanning and foxing. Plates are bright and clear. Cracking to hinges, no damage to end papers. Binding remains firm. Boards have moderate edge-wear with bumping to corners and rubbing to surfaces. Mild crushing to spine ends. Gilt lettering is bright and clear.