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C. MASON. The 1865 Dubuque City Directory listed Main between 2nd and 3rd.
The 1870-1871 Dubuque City Directory gave the address of this business as 35 Main. He was a tinner who also sold stoves.
The 1874-1875 Dubuque City Directory stated that this business was located at 257 Main.
The 1884-1885 Dubuque City Directory gave 251 Main as the address for C. Mason & Son.
See: Christopher MASON