1959. Twenty-fifth edition. 1008 pages. Pictorial dust jacket over pictorial cloth covered boards. Black and white illustrations throughout. Pages remain bright and clean with minimal tanning and foxing. Binding remains firm. A previous owner's name and dedication to front free endpaper. Boards have light shelf wear with minor corner bumping and crushing to spine ends. Book has slight backwards lean. Unclipped jacket has light edge wear with minor tears, chipping and creasing. Some tanning and foxing to all surfaces, particularly to spine.