1968. Sixth Impression. 403 pages. Grey dust jacket over green cloth. Front free endpaper appears to have been removed. Pages are lightly tanned and foxed throughout. Light thumb-marking present. Binding remains firm. Boards have mild edge wear with slight rubbing to surfaces. Soft crushing to spine ends. Light tanning to spine and edges. Unclipped jacket has light edge wear with chips, tears and creasing. Light tanning to spine and edges.