More on British-American relations in historical perspective. Mr. Martin's excellent study of differences over China policy is temperate and illuminating. He denies that American emulation of the British policy of recognizing the People's Republic of China would have made a great difference, but he does suggest that opportunities were lost for smoothing the sharp edges of U.S.-Chinese hostility. Mr. Freeman focuses on the negotiation of the Limited Test Ban Treaty of 1962 and the Nonproliferation Treaty of 1968, demonstrating the substantial British influence on both. He ends with a note of regret that a comprehensive test ban treaty, which the British favored, was not concluded.