Items

• [D7802ZSM], Letter from Hard Rubber and Cane Co to Thomas Alva Edison, July 15th, 1878
  1878-07-15
• [D7811D], Letter from Hard Rubber and Cane Co to Joseph Thomas Murray, February 28th, 1878
  1878-02-28
• [D7811ZAQ], Letter from Hard Rubber and Cane Co to Thomas Alva Edison, August 31st, 1878
  1878-08-31