1961. Thirty-third Edition. 330 pages. Pictorial dust jacket over red cloth. Black and white illustrations throughout. Pages are bright and clear with mild staining, foxing and tanning to text block edges, pastedowns and free endpapers. Hinges are lightly cracked but boards remain firmly attached. Boards have minor corner bumping and edgewear with mild staining, tanning and scuffing overall. Spine has light sunning with soft crushing to ends. Book has a slight forward lean. Unclipped dust jacket with minor rubbing, chipping and tearing to edges. Moderate tanning and scuffing overall.