Jonathan Carver,
Travels Through the Interior Parts of North America…
“ Towards the heads of the River Saint Croix, rice grows in great plenty, and there is abundance of copper. Though the Falls of Saint Anthony are situated at the south-east corner of this division, yet that impediment will not totally obstruct the navigation, as the River Saint Croix, which runs through a great part of the southern side of it, enters the Mississippi just below the Falls, and flows with so gentle a current that it affords a convenient navigation for boats. ”
