1960. Fourth Impression. 183 pages. No dust jacket. This is an ex-Library book. Green cloth covered boards. Library copy, with expected inserts, stamps and inscriptions. Pages remain clear with minimal tanning and foxing. End papers are more notably tanned. Text block edge is moderately foxed. Binding remains firm. Boards have mild edge-wear with slight rubbing to surfaces. Mild crushing to spine ends. Boards are bowed. Moderate tanning to spine. Cloth has minor damp and dust stains. Book has a slight forward lean.