1961. Sixth Edition. 211 pages. Pictorial dust jacket over yellow cloth. Colour photographic plates. Black and white illustrations throughout. Minor tanning to otherwise clear pages, plates, pastedowns and free endpapers. Pen inscription to front free endpaper. Binding remains firm. Boards have minor corner bumping and edgewear with mild tanning and scuffing overall. Spine has light tanning with soft crushing to ends. Unclipped dust jacket with moderate rubbing, chipping and tearing to edges; some mild tape repairing visible. Some minor tanning, creasing and scuffing overall.