1950. Sixth Edition. 478 pages. Illustrative jacket over green cloth. Pages remain bright and clear with minimal tanning and foxing. Thumb-marking present. Previous owner's inscription to front pastedown. Noticeable creasing to gutter. Hinges are cracked with exposed netting. Boards have mild edge-wear with slight rubbing to surfaces. Some bumping to corners. Light marks overall. Binding is somewhat shaky, but pages remain intact. Unclipped jacket has moderate edgewear with chips, tears and creasing. Loss to spine ends and edges. Some tanning to spine. Light rubbing to surfaces. Scuffing to edges.