resolutions from lowest to highest:
1. Alfred Edward Mathews (1831-1874). Denver, City of the Plains. Tinted lithograph, Plate 2. Mathews, A.E. Pencil Sketches of Colorado. New York: The Author, 1866. St. Louis Mercantile Library at the University of Missouri - St. Louis.
"Standing on the high ground a mile east of Denver, two hundred miles of the eastern slope of the Rocky Mountains can be seen. On the left Pike's Peak, and on the right Long's Peak tower above the surrounding mountains. These peaks are not so high as some others of the main range, but being at the extremity of spurs jutting out from it, they are more prominent. The view represents but a small section of what can be seen of the eastern slope of the mountains from this point. Long's Peak, near the right, is 50 miles from Denver, and the approximate height, 14,500 feet. The Snowy Range (Sawatch Range) is 60 miles distant, portions of it covered with snow rise above the other mountains. This view does not include Pike's Peak."