1946. Sixteenth Edition. 432 pages. Green cloth with a black and white illustrated frontis and photographic black and white plates throughout. There is black and white illustrations throughout. Moderate tanning to pages with heavy bending to pages and dog-eared pages throughout. Modest tanning to text block edges and both hinges are cracked with exposed netting. Covers have visible bending and rubbing with visible corner bending. Heavier sunning and creasing to spine.