Items

• [LM210515], Letter from William S Perry to Porter (H.K.) & Co, January 31st, 1894
  1894-01-31
• [LM218166], Letter from Thomas Alva Edison to Porter (H.K.) & Co, October 9th, 1893
  1893-10-09
• [LM242121], Letter from Walter Seeley Mallory to Porter (H.K.) & Co, February 20th, 1901
  1901-02-20