1961. Tenth Edition. 600 pages. Green dust jacket over green cloth. Contains black and white in-text illustrations. Pages are lightly tanned and foxed throughout. Previous owner's inscription to front pastedown and free endpaper. Binding remains firm. Boards have mild edge wear with slight rubbing to surfaces. Soft crushing to spine ends. Unclipped jacket has heavy edge wear with some areas of loss, heavy tears, chips and creasing. Moderate tanning to spine and edges. Heavy splits and scuffing overall.