Items

• [CE85014], Letter from Oscar Othan Siegel to William Henry Meadowcroft, May 11th, 1885
  1885-05-11
• [CE85026], Letter from Oscar Othan Siegel to Thomas Alva Edison, September 1st, 1885
  1885-09-01
• [D8048ZHH], Letter from Oscar Othan Siegel, John Henry Harjes to Constant Rousseau, December 11th, 1880
  1880-12-11
• [D8535ZBX], Letter from Oscar Othan Siegel to Thomas Alva Edison, October 19th, 1885
  1885-10-19
• [D8625444], Letter from Oscar Othan Siegel to Edison Electric Light Co of Europe Ltd, Thomas Alva Edison, March 17th, 1886
  1886-03-17
• [D8625555], Letter from Oscar Othan Siegel to Edison Electric Light Co of Europe Ltd, Thomas Alva Edison, March 5th, 1886
  1886-03-05