1958. Fourth Edition. 844 pages. No dust jacket. Green cloth with silver lettering. Black and white photographic images and illustrations throughout. Minor foxing and noticeable tanning to pages. More prominent to text block edges, pastedowns and free endpapers. Hinges are moderately cracked, exposing netting and causing boards to be loose. Annotations, underlining and marginalia in pencil throughout; text remains unaffected. Boards have minor corner bumping and edgewear with mild tanning and scuffing overall. Spine has heavier creasing and tanning with prominent splitting, fraying and crushing to ends. Lettering remains bright and clear. Book has a slight forward lean.