1959. 4th Edition, Revised. 224 pages. No dust jacket. Pictorial paper covered boards. Black and white illustrations throughout. Two colour maps inserted to pastedowns. One map missing. Binding remains firm. Pages and illustrations have light tanning and foxing throughout. Previous owner's inscriptions to front pastedown and endpaper. Minor dog-eared corners. Boards have light shelf-wear with corner bumping. Light tanning to spine and edges with crushing to spine ends. Foxing overall.