1967. Sixth Impression. 134 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. Some creasing to gutter. Binding remains firm. Boards have mild edge-wear with slight rubbing to surfaces. Visible crushing to spine ends. Some marks to boards. Unclipped jacket has light edgewear with tears and creasing. Some tanning to spine. Minor rubbing to surfaces.