1954. Sixth Edition. 462 pages. Illustrated dust jacket over brown cloth boards with lettering. Contains black and white and colour illustrations. Clean pages and illustrations with light tanning and mild foxing throughout. Moderate tanning to free endpapers due to dust jacket flaps. Binding remains firm. Boards have mild edge-wear with slight rubbing to surfaces and bumping to corners. Lettering is bright and clear. Minor tanning to spine and edges with crushing to spine ends. Minor wear marks to boards. Unclipped jacket. Panels and spine have light edgewear with tears and creases. Moderate tanning and wear marks to flaps, panels and spine.