Survey of British Commonwealth Affairs: Problems of Wartime Co-operation and Post-War Change, 1939–1952. By Nicholas Mansergh. (London, Toronto, New York: Oxford University Press. 1958. Pp. xvi, 469. $10.10.) - The Commonwealth in the World. By J. D. B. Miller. (Cambridge, Mass.: Harvard University Press. 1958. Pp. 308. $5.00.) - Commonwealth Perspectives. By Nicholas Mansergh, Robert R. Wilson, Joseph J. Spengler, James L. Godfrey, B. U. Ratchford, Brinley Thomas. (Durham, N. C.: Duke University Press; London: Cambridge University Press. 1958. Pp. viii, 214. $4.50.) - Evolving Canadian Federalism. By A. R. M. Lower, F. R. Scott , (Durham, N. C.: Duke University Press; London: Cambridge University Press. 1958. Pp. xvii, 187. $3.50.)