Items

• [E1518CDX], Letter from William Horatio Mason to Cambria Steel Co, Edgar Whitney Clarke, March 20th, 1915
  1915-03-20
• [E1518JAK], Letter from Thomas Alva Edison to Cambria Steel Co, Edgar Whitney Clarke, October 4th, 1915
  1915-10-04
• [LB101487], Letter from Thomas Alva Edison to Cambria Steel Co, Edgar Whitney Clarke, January 27th, 1915
  1915-01-27
• [LB101502], Letter from Thomas Alva Edison to Edgar Whitney Clarke, Cambria Steel Co, January 27th, 1915
  1915-01-27
• [LB101511], Letter from William Henry Meadowcroft to Cambria Steel Co, Edgar Whitney Clarke, January 28th, 1915
  1915-01-28