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FREDERICK ROEHL. According to the 1883 Dubuque City Directory, this business was located at 1875 Couler Avenue.
The 1884-1885 Dubuque City Directory listed 1868 Couler as the address.
The 1890-91 Dubuque City Directory through the 1903 Dubuque County Rural Route Directory listed 1862 Couler.