1950. Sixth Edition. 759 pages. No dust jacket. Blue cloth with gilt lettering. Black and white and colour photographic plates. Minor foxing and moderate tanning to pages and plates. Much more prominent to text block edges, pastedowns and free endpapers. Pen inscription to front free endpaper. Some tangible looseness to binding but pages remain attached. Boards have minor corner bumping and edgewear with mild tanning and scuffing overall. Spine has heavier tanning with visible splitting, fraying and crushing to joints and ends. Lettering remains bright and clear. Book has a slight forward lean.