Items

• [CJ003AFA], Letter from Thomas Alva Edison to U.S. Postmaster General, July 10th, 1891
  1891-07-10
• [LB050343], Letter from New Jersey and Pennsylvania Concentrating Works, Thomas Alva Edison to U.S. Postmaster General, July 17th, 1891
  1891-07-17
• [X201C], Letter from Thomas Alva Edison to U.S. Postmaster General, Walter Folger Brown, June 8th, 1929
  1929-06-08