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
The first European trade goods to reach the area would have been considered especially valuable and preserved as much as possible from loss or destruction.