Items

• [D7112C], Letter from Charles Place to Edison and Unger, October 11th, 1871
  1871-10-11
• [D7112D], Letter from Charles Place to Edison and Unger, October 26th, 1871
  1871-10-26
• [D7212A], Letter from William G Thornton to Edison and Unger, August 10th, 1872
  1872-08-10
• [SB1677040], Letter from John Clark to Edison and Unger, July 6th, 1874
  1874-07-06