1968. Seventh Edition. 816 pages. Illustrated dust jacket over grey cloth boards with lettering. Contains black and white illustrations. Clean pages and illustrations with light tanning and mild foxing throughout. More pronounced to free endpapers and pastedowns. Ink stamp inscription to back free endpaper. Minor water staining to top edges textblock. Binding remains firm. Boards have mild edge-wear with slight rubbing to surfaces and bumping to corners. Lettering is bright and clear. Minor sunning 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. Price sticker to flap. Visible wear marks to spine and panels.