This map segment of the Ionia Rail Corridor was taken from the 1891 Atlas of Ionia County Michigan from the UofM Digital Library and highlighted by me. The PM buildings are shown in blue and DGH&M in yellow. I viewed it as a PDF before downloading it to edit. Mill Street is on the far right.
Sorry about the small size. I linked this from one of my Silent Whistles geocache pages. If you follow the link to the Atlas, you can zoom in using Page Size control on the top of the page and scroll about using the scroll bars.
FYI, the 1906 Atlas in the same library sows the same layout.