1961. Third Edition. 324 pages. Blue dust jacket over blue cloth boards with gilt lettering to spine. Black and white illustrations throughout. Binding remains firm. Crinkling to pages at gutters. Pages remain bright and clear with minimal tanning. Boards have mild edge wear with slight rubbing to surfaces. Crushing to spine ends. Tanning to spine and edges. Gilt lettering is darkened slightly. Book has a slight forward lean. Unclipped jacket has light edge wear with minor tears and chipping. Mild rubbing and marking. Tanning to spine and edges.