1960. Third Edition. 294 pages. No dust jacket. Green cloth with gilt lettering. Pages remain bright and clear with minimal tanning and foxing. Binding remains firm. Photographic plates are bright and clear. Pencil annotations to half-title page. Boards have moderate edge-wear with bumping to corners and rubbing to surfaces. Gilt lettering is darkened. Mottling to spine and front and rear boards with brown stain to front board.