1951. Fourth Edition. 167 pages. Illustrated dust jacket over red cloth covered boards. Contains black and white photographic plates. Pages remain clear with minimal tanning and foxing, mild to end-papers and text-block edges. Plates are bright and clear. Binding remains firm. Boards have mild edge-wear with slight rubbing to surfaces. Book has a slight forward lean. Mild crushing to spine ends. Unclipped jacket has light edge-wear with tears and creasing.