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N. HERMAN THEDINGA
The 1874-1875 Dubuque City Directory stated that this business was located at 709 Main. His hardware store was located at 575 Main.
The 1875-1876 and 1880 Dubuque City Directory placed the company at 679 Main.
The 1884-1885 Dubuque City Directory listed 575 Main as the address.