1955. Seventh Edition. 396 pages. Illustrated dust jacket over blue cloth boards. Gilt lettering. Contains black and white illustrations. Clean pages and illustrations with light tanning and mild foxing throughout. Moderate tanning to free endpapers due to dust jacket flaps. Pencil and pen markings to front free endpaper. Minor tape marks to free endpapers. Boards have mild edge-wear with slight rubbing to surfaces and bumping to corners. Gilt lettering is bright and clear. Unclipped jacket. Panels and spine have light edgewear with tears and creases. Visible wear marks to spine and panels.