Archaeologists in Michigan have excavated a Native American camp near Dumaw Creek  Radiocarbon dating of animal bones found at the site indicates that the camp dates from some time between 1605 and 1755
However, the camp probably dates to no later than 1630, since no European trade goods were found at the site, and European traders were active in the region from the 1620' s onward
At all camps in the region that have been reliably dated to the late 1620's, remains of European trade goods have been found.