1948. Sixth Edition. 185 pages. Illustrative jacket over blue cloth. Contains black and white illustrations throughout. Pages remain bright and clear with minimal tanning and foxing. Thumb-marking present. Visible creasing to gutter. Binding remains firm. Boards have mild edge-wear with slight rubbing to surfaces. Light tanning to spine and edges. Minor marks to boards. Unclipped jacket has moderate edgewear with chips, tears and creasing. Visible tanning to spine. Noticeable rubbing to surfaces. Scuffing to edges.