1958. Nineteenth Edition. 147 pages. Blue dust jacket over marbled paper covered boards. Contains black and white illustrations throughout. Pages remain bright and clear with minimal tanning and foxing. Thumb-marking present. Noticeable creasing to gutter. Boards have moderate edge-wear with bumping to corners and rubbing to surfaces. Light crushing to spine ends. Visible tanning to spine and edges. Dents to edges. Textblock is shaky. Unclipped jacket has moderate edgewear with chips, tears and creasing. Some tanning to spine. Visible rubbing to surfaces. Scuffing to edges.