Items

• [QB001AAB], Letter from Sigmund Bergmann to Thomas Alva Edison, January 22nd, 1904
  1904-01-22
• [QB001AAE], Letter from Dr L Sell to Frank Lewis Dyer, January 28th, 1905
  1905-01-28
• [QB001AAH], Letter from Dr L Sell to Frank Lewis Dyer, January 10th, 1906
  1906-01-10
• [QB001AAJ], Letter from Frank Lewis Dyer to Dr L Sell, January 26th, 1906
  1906-01-26
• [QB001AAN], Letter from Frank Lewis Dyer to Sigmund Bergmann, March 22nd, 1906
  1906-03-22
• [QB001AAP], Letter from Frank Lewis Dyer to August Hagelin, April 20th, 1906
  1906-04-20