Items

• [MF35BQ], Letter from E B Brumm, Black Diamond Powder Co to William Henry Meadowcroft, May 27th, 1918
  1918-05-27
• [MF36AT], Letter from Black Diamond Powder Co, E B Brumm to Thomas Alva Edison, June 13th, 1918
  1918-06-13
• [MF37AM], Letter from Black Diamond Powder Co, E B Brumm to William Henry Meadowcroft, July 10th, 1918
  1918-07-10
• [MF37BC], Letter from Black Diamond Powder Co, E B Brumm to William Henry Meadowcroft, July 24th, 1918
  1918-07-24
• [MF37BH], Letter from E B Brumm, Black Diamond Powder Co to William Henry Meadowcroft, July 27th, 1918
  1918-07-27