1959. Revised Second Edition. 215 pages. This is an ex-Library book. Plain dust jacket over green cloth covered boards with silver lettering. Ex-Library copy, with expected inserts, stamps and inscriptions. Pages remain clear with minimal tanning and foxing. Cracking to hinges, no damage to end papers. Binding remains firm. Tape marks to paste downs. Boards have mild edge-wear with slight rubbing to surfaces. Mild crushing to spine ends. Gilt lettering is bright and clear. Cloth has minor damp and dust stains. Book has a slight forward lean. Unclipped jacket has light edge-wear with tears and creasing.