Items

• [D8303ZCW], Letter from Thomas Alva Edison to Pond Indicator Co, Charles N Talbot, April 30th, 1883
  1883-04-30
• [D8370ZBL1], Letter from James U MacKenzie to Pond Indicator Co, Thomas Alva Edison, July 30th, 1883
  1883-07-30
• [D8370ZBN], Letter from Lemuel Wright Serrell to Thomas Alva Edison, Pond Indicator Co, August 6th, 1883
  1883-08-06