William Henry Jackson (1843-1942) 

Pony Express Rider on the Sweetwater of 1860–61 / Devil’s Gate
Watercolor and gouache on artist’s paper
6 1/2 × 9 1/2 inches
Signed and dated 1941 lower right; titled on verso

     William Henry Jackson’s Pony Express Rider on the Sweetwater of 1860–61 / Devil’s Gate revisits a legendary episode of frontier history: the daring Pony Express riders who carried mail across the American West during 1860–61, following portions of the Overland Trail through the rugged terrain of present-day Wyoming.
     
     The watercolor presents a lone rider and horse moving rapidly across the broad expanse of the Sweetwater River valley, with the dramatic cleft of Devil’s Gate rising in the distance. Jackson places the small figure of the rider within a vast landscape of open plains, emphasizing the scale, isolation, and endurance required to cross the frontier. Additional riders appear along the distant trail, creating a sense of movement and continuity across the immense western terrain.
     
     Executed with delicate washes of watercolor and touches of gouache, Jackson creates a scene of muted earth tones, soft greens, and pale skies. The loose, expressive brushwork captures the changing light and spaciousness of the high plains, while the energetic placement of the horse and rider conveys urgency and adventure. The watercolor reflects Jackson’s lifelong fascination with the American West—a landscape he documented extensively through photography and art during a career spanning more than seven decades. 

     Completed in 1941, near the end of Jackson’s life, the work is both a historical reconstruction and a personal narrative on the American frontier. It celebrates the courage of the Pony Express riders while preserving the memory of a rapidly changing American landscape that Jackson had spent his lifetime recording.