1963. Fourth Impression. 346 pages. Orange photographic dust jacket over blue cloth boards with gilt lettering to spine. Foreword by F.T. Chapman. Black and white illustrations, illustrative plates & diagrams throughout. Binding remains firm. Crinkling to pages at gutters. Pages remain bright and clear with minimal tanning. Pencil inscription to front endpaper. Boards have mild edge wear with slight rubbing to surfaces. There is bumping to corners and crushing to spine ends. Boards are bowed. Book has a slight forward lean. Gilt lettering is bright and clear. Unclipped jacket has light edge wear with minor tears and chipping. Mild rubbing and marking. Tanning to spine and edges.