1957. Thirteenth Edition. 344 pages. Pictorial dust jacket over blue cloth boards with gilt lettering. Contains black and white illustrations. Slight crinkling to paper at gutter. Clean pages and illustrations with noticeable tanning and foxing throughout. Tightly bound with faint thumb marking throughout. Heavier tanning to free endpapers. Boards have mild edge-wear with slight rubbing to surfaces and bumping to corners. Slight crushing to spine ends. Gilt lettering is bright and clear. Book has a slight forward lean. Unclipped jacket. Panels and spine have moderate edgewear with chips, tears and creases. Minor loss to spine and panel. Moderate tanning to interior flaps, panels and spine.