1951. Fourth and Revised Edition. 167 pages. Pictorial dust jacket over red cloth. Contains black and white photographic plates. Pages and plates are lightly tanned and foxed throughout. Light thumb-marking present. Binding remains firm. Boards have mild edge wear with slight rubbing to surfaces. Soft crushing to spine ends. Book is slightly forward leaning. Clipped jacket has light edge wear with chips, tears and creasing. Light scuffing to spine. Rubbed marking overall.