1951. Fourth Edition . 476 pages. No dust jacket. Brown cloth. Contains black and white illustrations and photographs, some of which are folded. Pages are moderately tanned with noticeable foxing throughout. Cracks to guttering, causing pages to become loose. Pen scribbles to front free endpaper and pastedown. Illustrations and photographs are moderately tanned with some foxing. Large tear to front pastedown. Thumb-marking present throughout. Boards have visible edge wear with corner bumping. Moderate tanning to spine and edges with some crushing to spine ends. Gilt lettering is darkened. Fraying with splits to spine edges. Black marks overall. Book has a slight forward lean.