Items

• [D8042ZAF], Letter from William M Seyfert to Thomas Alva Edison, April 7th, 1880
  1880-04-07
• [D8042ZAU], Letter from William M Seyfert to Thomas Alva Edison, June 17th, 1880
  1880-06-17
• [D8042ZAW], Letter from William M Seyfert to Josiah Custer Reiff, June 16th, 1880
  1880-06-16
• [W100CAK], Agreement, William Jackson Palmer, Augustus B Wood, Thomas Alva Edison, Robert W Russell, Josiah Custer Reiff, Henry C Dallett, William M Seyfert, American Automatic Telegraph Co, December 23rd, 1875
  1875-12-23