1971. Nineteenth Edition. 2420 pages. Illustrated dust jacket over green cloth boards. Gilt lettering. Contains black and white 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. Textblock edges dyed green with finger holes in fore edges. Binding remains firm. Boards have mild edge-wear with slight rubbing to surfaces and bumping to corners. Gilt lettering is bright and clear. Minor wear marks to boards. Unclipped jacket. Panels and spine have moderate edgewear with chips, tears and creases. Moderate loss to spine and edges. Visible wear marks to spine and panels.