1950. Fourth Impression. 253 pages. Blue dust jacket over red cloth. Contains black and white photographic plates. Clean pages with mild tanning and foxing throughout. Tightly bound with visible thumb-marking throughout. Moderate tanning and foxing to text block edges. Boards have light shelf-wear with corner bumping. Mild crushing to spine ends. Moderate water stains to front board. Unclipped jacket has light edgewear with tears and creasing. Mild foxing. Heavy tanning to spine. Notable rubbing and marking all over.