1949. Seventh Edition. 181 pages. Dust jacket over blue cloth. Clean pages with mild tanning and foxing throughout. Tightly bound with faint thumb-marking throughout. Previous owner's inscription to front endpaper. Boards have light shelf-wear with corner bumping. Mild tanning to spine, which has mild crushing and wear to ends. Unclipped jacket has moderate edgewear with chips, tears, and creasing. Notable foxing. Heavy tanning to spine and edges. Mild rubbing and marking all over.