1968. Fourth Edition. 499 pages. Cream jacket with red lettering to front & spine over red cloth with gilt lettering to spine. Pen inscription to front pastedown. Top text block edge has been dyed red. Pages remain bright with minimal tanning. Text is clear. Binding remains firm. Boards have mild edge-wear with bumping to corners. Noticeable white staining. Gilt lettering is bright and clear to spine. Unclipped jacket. Panels have moderate edge wear with chips, tears, and creasing. Visible watermarks. Rear joint of spine slip but remains attached.