This subseries contains correspondence between Lehman and significant politicians, artists, scientists, and other well-known individuals, as well as members of Lehman's family. Correspondents include, among many others, Albert Einstein, Alfred Knopf, Wellington Koo, J. Edgar Hoover, Joseph McCarthy, and Presidents Herbert Hoover, Franklin D. Roosevelt, Harry S. Truman, Dwight Eisenhower, John F. Kennedy, Lyndon B. Johnson, and Richard Nixon. The Special Correspondence Files have been scanned and cataloged and are available online at https://dlc.library.columbia.edu/lehman.