1972. Revised Edition. Unpaginated. No dust jacket. Blue cloth. Vol. XI. Second half is formed of photographic plates in both colour and black and white. Pages are paginated at 930, with plates at 548. Rebound. Pages and plates remain bright and clear. Visible brown marks to fore edge of textblock. Binding is firm. Boards and spine have minimal shelf-wear, with minor corner bumping and crushing to ends. Noticeable marking and scuffing overall, heaviest to rear board.