London: Macmillan and Co., 1963. Hardcover. First Edition. 1434, LV pp. 4to. Green library binding, ex-library with stamp of "Technical Library, U.S. Naval Propellant Plant, Indian Head, Maryland" on first free endpaper, title page, and final free endpaper. No other library markings present Clean within. Very Good.
Wilson first proposes the theory of "Continental Drift."