1966. Eighteenth Edition. 669 pages. No dust jacket. Orange cloth. Contains black and white in-text illustrations. Pages are lightly tanned and foxed throughout, heavier to endpapers. Occasional thumb-marking present. Binding is slightly shaky. Boards have mild edge wear with slight rubbing to surfaces and bumping to corners. Soft crushing to spine ends. Book is slightly forward leaning. Notable sunning to spine and edges. Speckled dark marking to spine, with dark rubbing overall.