The Nuttall Encyclopedia
A river in N. America, rises in the Rocky Mountains; is fed by mighty streams in its course, and falls into the Arctic Ocean after a course of over 2000 m. in length.
Wood, James, ed. Entry for 'MacKenzie River'. The Nuttall Encyclopedia. https://www.studylight.org/encyclopedias/eng/nut/m/mackenzie-river.html. Frederick Warne & Co Ltd. London. 1900.