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These records consist of correspondence and other documents pertaining to Edison's relationship with Western Union and subsidiary companies such as the Gold and Stock Telegraph Co. and the American Speaking Telephone Co. The documents appear in three series: (1) Correspondence and Other Unbound Documents; (2) Minute Books; (3) Letterbooks.
A finding aid to the archival collection can be found at the website of the Lemelson Center for the Study of Invention & Innovation. Courtesy of the NMAH Archives Center.