1965. Reprint. 91 pages. Blue dust jacket over green cloth. Contains black and white illustrations throughout. Pages remain bright and clear with minimal tanning and foxing. Pen inscription to front free endpaper. Annotations and marginalia to additional observation pages. Light creasing to gutter. Minor dog-eared corners. Binding remains firm. Boards have mild edge-wear with slight rubbing to surfaces. Light bumping to corners. Soft crushing to spine ends. Slight tanning to spine and edges. Dent to front board. Unclipped jacket has light edgewear with tears and creasing. Notable tanning to spine. Green mark to front panel.