Items

• [D8020ZAE], Letter from George Clark to Thomas Alva Edison, January 19th, 1880
  1880-01-19
• [D8020ZAQ], Letter from George Clark to Thomas Alva Edison, January 25th, 1880
  1880-01-25
• [D8020ZEL], Letter from George Clark to Thomas Alva Edison, April 28th, 1880
  1880-04-28