1964. Eleventh Edition. 316 pages. Illustrated dust jacket over blue cloth boards. Gilt lettering. Contains black and white and colour illustrations. Clean pages and illustrations with light tanning and mild foxing throughout. More pronounced to free endpapers and pastedowns. Pen inscription to front free endpaper. Binding remains firm. Boards have mild edge-wear with slight rubbing to surfaces and bumping to corners. Gilt lettering is darkened. Moderate tanning to spine and edges with crushing to spine ends. Visible wear marks to boards. Clipped jacket. Panels and spine have light edgewear with tears and creases. Moderate tanning and wear marks to flaps, panels and spine.