12/21/1878 Gold and Stock Telegraph Co and Scott, George B to Frisbee, Samuel Hanna
(Edison, Thomas Alva) Carbon, coal, glass, ceramics; Telephone [Attachment/Enclosure]
[D7937]  Document File Series -- 1879: (D-79-37) Telephone -- General
[D7937D; TAEM 52:6]
Courtesy of Thomas Edison National Historical Park.