1950. Fourth Edition. 278 pages. Dust jacket covered in removable plastic wrapper over grey illustrated cloth. Clean pages with mild tanning and visible foxing throughout. Tightly bound with mild thumb-marking throughout. Previous owner's inscription to front endpaper. Notable tape staining to endpapers. Boards have light shelf-wear with corner bumping. Mild crushing to spine ends. Tape to boards. Book has forward lean. Boards are mildly warped. Unclipped jacket has light edgewear with tears and creasing. Heavy rubbing and marking all over.