1961. 4th edition. 131 pages. Illustrated dustjacket over green cloth. folded map in rear pocket in good condition with single crease. Includes black & white plates. Pages remain bright and clear with minimal tanning and foxing. Stickers and pencil inscriptions to front endpaper. Boards have moderate edge-wear with bumping to corners and rubbing to surfaces. Spine has crushing to both ends. Book has forward lean. Unclipped jacket has light edgewear with tears and creasing. Green marking to bottom of front cover.