1967. Fourth Revised Edition. 261 pages. Browned dust jacket with red lettering over red cloth. Jacket was originally blue. Pen marking and small brown stains to pages on occasion. Minimal tanning to endpapers and page edges. Mild wear to spine, board edges and corners, with scuffing and soiling to boards. Unclipped dust jacket. Mild wear, tear and chipping to edges and corners. Heavy tanning, with notable staining and soiling to DJ.