1966. Fourth Revised Edition. 72 pages. Pictorial dust jacket over red cloth. Contains black and white, and colour photographic plates. Pages and plates are lightly tanned and foxed throughout. Minor pencil inscription to front free endpaper. Binding remains firm. Boards have mild edge wear with slight rubbing to surfaces. Soft crushing to spine ends. Unclipped jacket has light edge wear with chips, tears and creasing.