1940. Twenty-Third Edition. 158 pages. No dust jacket. Blue cloth. Black and white illustrations throughout. Clean pages with noticeable tanning and mild foxing throughout. Tightly bound with visible thumb-marking throughout. Mild water staining to pages throughout. Pencil inscription to front endpaper. Boards have light edgewear with corner splitting and notable marking to boards. Heavy tanning to board edges and spine, which has mild loss to ends. Large water stains to boards. Book has forward lean. Boards are mildly warped.