London: Oxford University Press, 1950.
Hardcover. Very Good in a Good dust jacket. Fourth edition, updated to the outbreak of war. xi, 540 pp, with maps, index. Bumped upper corners; contents clean and sound, with brief gift inscription on front endpaper. Dust jacket is price clipped and has chipping to the upper spine and corners. Organized into three parts: the period of settlement 1920-1925, the period of fulfilment 1925-1930, and the period of collapse 1930-1938.