1948. Fourth Edition. 703 pages. Illustrative jacket over green cloth. Contains black and white plates throughout. Pages remain bright and clear with minimal tanning and foxing. Heavier tanning to front and rear free endpapers. Thumb-marking present. Light creasing to gutter. Boards have mild edge-wear with slight rubbing to surfaces. Soft bumping to corners. Moderate crushing to spine ends. Visible tanning to spine and edges. Textblock is shaky. Clipped jacket has heavy edgewear with some areas of loss, heavy tears, chips and, creasing. Visible rubbing to surfaces. Notable tanning to spine. Tape repairs to interior.