"Encyclopedia Dubuque is the online authority for all things Dubuque, written by the people who know the city best.”
Marshall Cohen—researcher and producer, CNN
C. KALTENBACH. The 1861 Dubuque City Directory listed 88 Main.
The 1870-1871 Dubuque City Directory, gave the address of this business as the southwest corner of 8th and Main.
The 1875-1876 Dubuque City Directory gave 453 Main as the company address.
The 1878-79 Dubuque City Directory listed 487 Main.