1955. Fourth Edition. 1078 pages. Laminated pictorial dust jacket over black cloth with gilt lettering. Pages are bright and clear with mild foxing and tanning to text block edges, pastedowns and free endpapers. Mild creasing to hinges. Binding remains firm. Boards have minor corner bumping and edgewear with mild scuffing overall. Spine has light sunning with soft crushing to ends. Lettering remains bright and clear. Book has a slight forward lean. Unclipped dust jacket with minor rubbing, chipping and tearing to edges. Moderate tanning and scuffing overall.