1957. Sixth Edition. 634 pages. Blue and white dust jacket over blue cloth. Contains colour plates throughout. Pages remain bright and clear with minimal tanning and foxing. Minor dog-eared corners. Thumb-marking present. Previous owner's inscription to front free endpaper. Visible creasing to gutter. Boards have mild edge-wear with slight rubbing to surfaces. Visible crushing to spine ends. Light tanning to spine and edges. Small marks to boards. Textblock is shaky. Unclipped jacket has moderate edgewear with chips, tears and creasing. Visible tanning to spine. Light rubbing to surfaces.