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A view west of the foothills of the Wahsatch Mountains from near a campsite occupied by the Gunnison Expedition along Oak Creek, Utah, on October 12, 1853.

A view north across the Black Canyon of the Gunnison River from a campsite along Pine Creek, Colo., occupied by the Gunnison Expedition on September 10, 1853.

Huerfano (Orphan) Butte, a landmark formation along The Huerfano River that now sits next to Interstate-25. Richard Kern’s sketch dates to August 8, 1853, while on the Gunnison Expedition.

Vogel’s Field Monument, Kansas City, Mo.

Shawnee Methodist Mission, Fairway, Kans.

Factory Butte and the Henry Mountains, Utah.

East Pass Creek, Colo.

Chimney Peak, Colo., from the crest of Owl Creek Pass.