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Encyclopedia Dubuque


"Encyclopedia Dubuque is the online authority for all things Dubuque, written by the people who know the city best.”
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Affiliated with the Local History Network of the State Historical Society of Iowa, and the Iowa Museum Association.


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Photographer unknown, “[Interior of H. E. Callahan drug store],” Loras College Digital Collections, accessed March 2, 2017, https://digitalcollections.loras.edu/items/show/555.
H. E. CALLAHAN. The 1911-12 Dubuque City Directory listed 1197 Iowa.

The 1913 Dubuque and Dubuque County Directory stated that this business was located at 631 Clay.

The 1915 Dubuque City Directory located this business at 743 Clay.