1967. 26th Edition. 284 pages. Pictorial dust jacket over blue cloth. Binding remains firm. Pages have light tanning and foxing throughout. Water staining to some page edges, text remains unaffected. Previous owner's inscription to front free endpaper. Boards have light shelf-wear with corner bumping. Light tanning to spine and edges with crushing to spine ends. Unclipped jacket has moderate edgewear with chips, tears, and creasing. Water staining to spine and rear panel. Ring mark to front panel. Light foxing overall.