Encyclopedia Dubuque
"Encyclopedia Dubuque is the online authority for all things Dubuque, written by the people who know the city best.” —Marshall Cohen, CNN
Affiliated with the Local History Network of the State Historical Society of Iowa, and the Iowa Museum Association
CENTRAL UNION TELEPHONE COMPANY
CENTRAL UNION TELEPHONE COMPANY. The Central Union Telephone Company eventually became the Bell Telephone System. (1)
The 1884-1885 through 1890-91 Dubuque City Directory gave the northwest corner of Main and 6th as the address.
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Source:
1. www.geneseo.com/company-history/