Items

• [D7702A1], Letter from Amasa Mason to Thomas Alva Edison, February 8th, 1877
  1877-02-08
• [D7802ZZFG], Letter from Amasa Mason to Thomas Alva Edison, October 17th, 1878
  1878-10-17
• [X111AZ], Letter from Amasa Mason to Marshall Lefferts, April 8th, 1876
  1876-04-08
• [X111BC], Letter from Amasa Mason to Marshall Lefferts, April 13th, 1876
  1876-04-13
• [X111BF], Letter from Amasa Mason to Marshall Lefferts, May 5th, 1876
  1876-05-05
• [X111BR], Letter from Amasa Mason to Marshall Lefferts, May 25th, 1876
  1876-05-25
• [X111BU], Letter from Amasa Mason to Marshall Lefferts, May 27th, 1876
  1876-05-27
• [X111BV], Letter from Amasa Mason to Marshall Lefferts, May 30th, 1876
  1876-05-30
• [X111BW], Memorandum, Amasa Mason, May 1876
  1876-05-00
• [X111BY], Letter from Amasa Mason to Marshall Lefferts, June 3rd, 1876
  1876-06-03
• [X111CD], Letter from Amasa Mason to Marshall Lefferts, June 30th, 1876
  1876-06-30