These handwritten stamps are a little way up the street from the handwritten C.H. Peel, but in this case I can be quite confident they are contractor’s marks from the fact that there are two of them paired on either end of a stretch of sidewalk, as a contractor would do to mark the beginning and end of the work they were responsible for. This is on the west side of the 400 block of Leslie Street between Kalamazoo and Elizabeth.
In these (not very good) photos it is hard to tell that the first letter is a C, but I’ve seen it by daylight and know that it is. My usual tricks didn’t bring me any joy. I couldn’t find out anything at all about C. Fletcher.