Items

• [D7511A1], Letter from Henry W Spang, Philadelphia Reading and Pottsville Telegraph Co to Thomas Alva Edison, May 17th, 1875
  1875-05-17
• [D7702L], Letter from Henry W Spang to Thomas Alva Edison, May 16th, 1877
  1877-05-16
• [D7702V], Letter from Henry W Spang to Thomas Alva Edison, June 12th, 1877
  1877-06-12
• [D7838ZAC], Letter from Henry W Spang to Thomas Alva Edison, March 14th, 1878
  1878-03-14
• [D8470ZAL], Letter from Ball Electric Manufacturing Co Ltd, Henry W Spang to Thomas Alva Edison, August 11th, 1884
  1884-08-11
• [D8828ABU], Letter from Henry W Spang to Thomas Alva Edison, June 4th, 1888
  1888-06-04
• [SM008011c], Clipping, Telegraphic Journal, Henry W Spang, 1873-1885
  1873-1885