1950. Third Edition. 375 pages. Brown dust jacket over brown cloth. Ex-libris plate stuck to front pastedown. Pages remain bright and clear with minimal tanning and foxing. Thumb-marking present. Noticeable creasing to gutter. Binding remains firm. Boards have mild edge-wear with slight rubbing to surfaces. Soft crushing to spine ends. Light tanning to spine and edges. Small marks to boards. Unclipped jacket has heavy edgewear with some areas of loss, heavy tears, chips and, creasing. Visible tanning to spine. Some rubbing to surfaces. Scuffing to edges.