1939. Fourth Impression. 512 pages. Pictorial dust jacket over green cloth. Black and white photographs, illustrations and maps. Pages with some foxing and tanning, particularly to endpapers and textblock edges. Binding slightly loose. Boards have moderate shelf wear with mild bumping and rubbing to corners and crushing and fraying to spine ends. Some sunning to board edges. Unclipped jacket has heavy edge wear with large tears, chipping and creasing. All surfaces heavily tanned, particularly spine.