Telegrams
Morse Telegraph Club, Inc. (The Morse Telegraph Club is an international non-profit organization dedicated to the perpetuation of the knowledge and traditions of telegraphy.)
Morse Telegraph Club
Western Union Telegraph Company Records, 1820-1995 Archives Center, National Museum of American History, Smithsonian Institution.
Lemelson Center: Archives: Western Union Collection
Anglo-American Telegraph Company, Ltd. Records, 1866-1947 Archives Center, National Museum of American History, Smithsonian Institution.
Technology, invention, and innovation collections
History of the U.S. Telegraphic Industry from EH.NET encyclopedia article industry telegraphic
EH.Net Encyclopedia: History of the U.S. Telegraph Industry
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