1950. Fourth Edition. 204 pages. No dust jacket. Blue cloth. Contains black and white photographic plates. Pages and plates are lightly tanned and foxed throughout. Cracking to gutters of a few pages with exposed binding. Occasional thumb-marking present. Pencil underlining and marginalia throughout. Binding is slightly shaky. Boards have heavy edge wear with bumping to corners and rub wear all over. Soft crushing to spine ends. Mild tanning to spine and edges. Speckled white marking to front board.