1969. Twelfth Edition. 546 pages. Dust jacket over red cloth with gilt lettering. Pages are bright and clear with light tanning to text block edges. Pen inscription to front free endpaper. Occasional annotations, underlining and marginalia in pen throughout; text remains unaffected. Binding is loose. Boards have minor corner bumping and edgewear with mild scuffing overall. Spine has light tanning with soft crushing to ends. Lettering remains bright and clear. Unclipped dust jacket with moderate rubbing, chipping and tearing to edges. Moderate tanning and scuffing overall.