Items

• [E1109AK], Letter from Frank H Coyne to Thomas Alva Edison, November 1st, 1911
  1911-11-01
• [E1109BI], Letter from Frank H Coyne to Thomas Alva Edison, December 13th, 1911
  1911-12-13
• [E1410AR], Letter from Frank H Coyne to William Henry Meadowcroft, November 1st, 1914
  1914-11-01