1961. Twelfth Edition. 209 pages. Illustrated dust jacket over red cloth boards with gilt lettering. Slight crinkling to gutters however binding remains firm. Pages remain clear with minimal tanning and foxing. Pens annotations and marginalia to pages throughout. Pen markings to front free endpaper and pastedown. Minor dog-eared corners. Boards have mild edge-wear with slight rubbing to surfaces and bumping to corners. Gilt lettering is darkened. Slight crushing to spine ends. Unclipped jacket. Panels and spine has light edgewear with tears and creasing. Minor loss to back panel. Slight tanning to panels and spine. Visible wear marks to panels.