On October 4, 1931, Chester Gould's comic strip, "Dick Tracy," first appeared in the Detroit Daily Mirror. Less than a year later, the Mirror ceased publication, shocking its staff and its 170,000 daily readers.
Fortunately, the adventures of the square-jawed, plainclothes detective continued to run daily in many other papers to this day. At its peak the comic strip ran in 750 papers.
Zlati Meyer, "This week in Michigan history: 'Dick Tracy' makes its world premiere in Detroit paper", Detroit Free Press, September 30, 2012
Detroit Historical Society
Check out the The complete Chester Gould's Dick Tracy dailies & Sundays in the MSU Main Library Special Collections Comic Art Collection. While you are there, check out the other copies of Dick Tracy comics.