Lat.: 48°51'09.91" Long.: 87°34'22.96" start of trip
Lat.: 48°57'31.45" Long.: 88°14'04.42" end of day
Note:- Umfreville does not specifically describe the location
of his first nights camp.
I am guessing at this location, but it was around
the mouth of the river.
Detailed route for trip-
