In 1946 Frank Walker accompanied Secretary of State James Byrnes, Eleanor Roosevelt, and Edward R. Stettinius, Jr. to London as a member of the United States delegation to the first session of the United Nations (U.N.) following the adoption of the group's charter at the San Francisco Conference in 1945. Walker's records from these meetings include correspondence, his diary for December 1945 to February 1946, reports of the United States delegation, memoranda reporting meetings with other delegations, U.N. General Assembly resolutions and amendments, lists of U.N. committees and minutes from their meetings, a digest of world press comments on the U.N., and press releases. Correspondents include other members of the United States delegation, organizations and individuals interested in world cooperation, delegates from other countries, and U.N. officials. Walker's work with the United Nations Organization and the U.N. delegation was his last act of public service before returning to his family business and personal interests. Newspaper clippings concerning United Nations activities of this period can be found in the Scrapbook Series.