Names
- Hopkins, Ernest Martin, 1877-1964.1
- Houston & Texas Central Railway Company.1
- Houston and Shreveport Railroad Company.1
- Houston, East and West Texas Railway.1
- Howe, A. A. DeWolfe.1
- Howe, A.A. DeWolfe.1
- Hoxie, Robert Franklin, 1868-1916.1
- Hull, Charles Henry, 1864-1
- Hunt, Jean Lee.1
- Hutchins, Harry B. (Harry Burns), 1847-1930.1
- Illinois Birth Control League.1
- Illinois Central Railroad Company.1
- Illinois Tunnel Company.1
- Immigration Restriction League.1
- Institute of International Education (New York, N.Y.)1
- International & Great Northern Railroad.1
- Interstate Commerce Commission.1
- Iowa Central Railway Company.1
- James, Edward Janes, 1855-1925.1
- James, Howard M.1