Items

• [D0134AAG], Letter from Thomas Alva Edison to De Haen (E.), April 18th, 1901
  1901-04-18
• [D0706AAE], Telegram from Thomas Alva Edison to De Haen (E.), June 26th, 1907
  1907-06-26
• [D9828AAB], Telegram from Thomas Alva Edison to De Haen (E.), June 6th, 1898
  1898-06-06
• [E1337AU], Letter from Thomas Alva Edison to De Haen (E.), October 6th, 1913
  1913-10-06
• [LB075188], Letter from Thomas Alva Edison to De Haen (E.), December 13th, 1906
  1906-12-13
• [LB079692], Letter from Thomas Alva Edison to De Haen (E.), May 3rd, 1909
  1909-05-03
• [LB080326], Letter from Thomas Alva Edison to De Haen (E.), July 15th, 1909
  1909-07-15
• [LB081107], Letter from Harry Frederick Miller to De Haen (E.), October 20th, 1909
  1909-10-20
• [LM224184], Letter from Thomas Alva Edison to De Haen (E.), September 3rd, 1894
  1894-09-03