Items

• [D8020ZFF], Letter from Ernest Greenwood to Thomas Alva Edison, June 17th, 1880
  1880-06-17
• [D8020ZFM], Letter from Ernest Greenwood to Thomas Alva Edison, July 13th, 1880
  1880-07-13
• [D8020ZGE], Letter from Ernest Greenwood to Thomas Alva Edison, August 19th, 1880
  1880-08-19