Items

• [X012L2E], Technical Note, American Bell Telephone Co, 1880
  1880-00-00
• [X099BD080], Report from Gold and Stock Telegraph Co, George Walker, September 24th, 1878
  1878-09-24
• [X099BE025], Minutes, American Speaking Telephone Co, April 16th, 1878
  1878-04-16
• [X099BE033], Minutes, American Speaking Telephone Co, June 11th, 1878
  1878-06-11