"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
JACOB KETTENHOFEN. The 1911-12 Dubuque City Directory through 1913 Dubuque and Dubuque County Directory stated that this business was located at 1527 Clay.
The 1916-1917 White's Dubuque County Directory listed 1583 Clay as the address.