Items

• [D8855ACJ], Letter from Arthur Edwin Kennelly to Callender Insulating and Waterproofing Co, W M Callender, December 5th, 1888
  1888-12-05
• [LB027429], Letter from Alfred Ord Tate to Callender Insulating and Waterproofing Co, December 17th, 1888
  1888-12-17
• [LB023099], Letter from Samuel Insull to Callender Insulating and Waterproofing Co, November 16th, 1886
  1886-11-16
• [LB023100], Letter from Samuel Insull to Callender Insulating and Waterproofing Co, November 17th, 1886
  1886-11-17
• [X098C007], Letter from William Joseph Hammer to Callender Insulating and Waterproofing Co, December 31st, 1888
  1888-12-31