Items

• [MF35BM], Letter from Thomas Alva Edison to Black Diamond Powder Co, May 24th, 1918
  1918-05-24
• [MF35BV], Telegram from William Henry Meadowcroft to Black Diamond Powder Co, May 31st, 1918
  1918-05-31
• [MF37BG], Letter from William Henry Meadowcroft to E B Brumm, Black Diamond Powder Co, July 26th, 1918
  1918-07-26
• [MF39AE], Letter from William Henry Meadowcroft to Black Diamond Powder Co, September 10th, 1918
  1918-09-10