Items

• [D8835AFB], Letter from David Trumbull Marshall, Thomas Alva Edison to Samuel Insull, December 19th, 1888
  1888-12-19
• [D8930AAX], Letter from David Trumbull Marshall to John Kruesi, June 4th, 1889
  1889-06-04
• [D8930ABU], Letter from David Trumbull Marshall to John Kruesi, 1889
  1889-00-00
• [NB015AAA], Technical Note, David Trumbull Marshall, January 1888
  1888-01-00