resolutions from lowest to highest:
9. Alfred Edward Mathews (1831-1874). The Palisades. Tinted lithograph, Plate 26. Mathews, A.E. Pencil Sketches of Montana. New York: The Author, 1868. Archives & Rare Books Department, University Libraries, University of Cincinnati.
"Plate XXVI is a view about seventy-five miles below Fort Benton, looking down. The
artist has called these high, perpendicular sandstone rocks, 'the Palisades.' The
dark column seen beyond them is volcanic."