CENTRAL LUMBER AND COAL COMPANY
The 1911-12 Dubuque City Directory listed the southeast corner of 7th and Jackson.
The 1915 Dubuque City Directory and the 1918 Dubuque and East Dubuque City Directory listed the address as 620 7th.
The 1923 Dubuque City Directory listed 505 Main.
See: STANDARD LUMBER COMPANY.
"Dubuque Lumber Executive Dies," Telegraph Herald and Times Journal, January 24, 1933, p. 16. Online: http://news.google.com/newspapers?id=SPNFAAAAIBAJ&sjid=JL4MAAAAIBAJ&pg=3347,6130671&dq=lumber+companies+dubuque&hl=en