1955. Seventh Edition. 287 pages. No dust jacket. Blue cloth with gilt lettering to front board and spine. Pages are bright and clear with light tanning and foxing to free endpapers and text block edges. Occasional faint thumb-marking present throughout, with a few small nicks and rub marks along text block edge. Boards have light shelf-wear with minor corner bumping and slight crushing to spine ends. Book has a pronounced forward lean and subtle bow. Light tanning to spine. Liquid drops on front board.