Items

• [D8303ZBG], Letter from Franklin Leonard Pope to Operator, Electrical World, February 26th, 1883
  1883-02-26
• [NM003124], Letter from Thomas Alva Edison to Operator, November 25th, 1874
  1874-11-25
• [PA070], Letter from Thomas Alva Edison to Operator, November 25th, 1874
  1874-11-25