Items

• [D8253B], Letter from Oscar E Madden, American Bell Telephone Co to Thomas Alva Edison, January 27th, 1882
  1882-01-27
• [D8253H], Letter from American Bell Telephone Co, Oscar E Madden to Richard Nott Dyer, February 20th, 1882
  1882-02-20
• [D8403ZFF], Letter from American Bell Telephone Co, Oscar E Madden to Thomas Alva Edison, July 31st, 1884
  1884-07-31
• [X099AZB], Letter from Oscar E Madden to Theodore Newton Vail, October 25th, 1884
  1884-10-25