1956. Sixth Edition. 236 pages. No dust jacket. Brown cloth. Clean pages with noticeable tanning and foxing throughout. Tightly bound with faint thumb-marking throughout. Mild stains to some pages throughout. Previous owner's inscription to front endpaper. Boards have light shelf-wear with corner bumping. Large water stains to boards. Mild scratching and marking to boards. Mild warping to rear board.