1957. Third Edition. 255 pages. No dust jacket. Plain paper covered boards with a black spine strip. Bound using 4 threads. Pages remain clear with minimal tanning and foxing, mild to end-papers and text-block edges. Pages are slightly pulled from binding threads in places, almost becoming detached in places. Hinges are cracked with exposed netting. Boards have mild edge-wear with slight rubbing to surfaces. Mild crushing to spine ends, with fraying cloth and small splits. Covering has minor damp and dust stains.