1967. Thirty-third Impression. 544 pages. Illustrated paper covers. Moderate tanning to pages and text block edges; prominent staining to text block edges also. Hinges and gutters are visibly cracked but covers and pages remain firmly attached. Slight brittleness to pages in general. Paper covers have light edge-wear and corner curling with mild tanning and scuffing overall. Spine has minor rolling and creasing.