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Like his Rockefeller Foundation job, Dr. Sawyer's work for the United Nations Relief and Rehabilitation Administration (UNRRA) required much traveling. In early 1946 he went to China to assess the post-war public health situation and the UNRRA programs already in place. In this letter he described visits to Canton and Chungking, and the next visit to Kaifeng, where UNRRA was helping to repair a riverbank on the Yellow River which had been destroyed to thwart the progress of Japanese troops during the war.