From an NPS webpage:
http://www.nps.gov/history/history/online_books/runte1/index.htmNational Parks
The American Experience
Chapter 1:
Catalysts: Nationalism, Art, and the American West
......The popularity of the Rocky Mountain School thus further prepared the United States to turn from simply appreciating its natural wonders to preserving them. To be sure, although artists such as George Catlin, Karl Bodmer, and George Caleb Bingham preceded the Rocky Mountain School into the West, as pioneers none was privileged to visit those wonderlands whose uniqueness later evoked cultural as well as artistic acclaim. The popularization of Yosemite Valley and the Yellowstone, in particular, respectively awaited the co-founders of the Rocky Mountain School, Albert Bierstadt and Thomas Moran. [28] Bierstadt, drawn west by the Rocky Mountains in 1859, painted the region more than a decade prior to Moran, which explains his earlier fame and importance. After sketching the Wind River Mountains and other large peaks in what is now the state of Wyoming, Bierstadt returned east and moved his studio from New Bedford, Massachusetts, to New York City, where, shortly afterward, the first of his paintings went on display at the National Academy of Design. Among them was The Base of the Rocky Mountains, Laramie Peak, shown in April 1860. Measuring a full 4-1/2 by 9 feet, it not only established his reputation but alerted the public to expect similar interpretations of the West in subsequent years. [29]
Bierstadt's second trip west in 1863 led him to California, where he became intimate with perhaps his most familiar trademark—Yosemite Valley. For seven weeks during August and September he rambled through the gorge, retracing the footsteps of Horace Greeley, the Reverend Thomas Starr King, and other early visitors. From his sketches evolved a lengthy series of paintings, including Valley of the Yosemite (1864), which sold the following year for $1,600. An even more dramatic success awaited The Rocky Mountains (1863). In 1865 the 6-by-10-foot canvas commanded $25,000, then the highest sum ever awarded an American artist. Two years later Bierstadt repeated the triumph with Domes of the Yosemite. A whopping 9-1/2 by 15 feet, it too was commissioned for $25,000. [30]
While Bierstadt's accomplishments affirmed the popularity of the American West, still others turned to the rising profession of photography to substantiate nationalists' claims. Carleton E. Watkins, for example, photographed Yosemite Valley and the Sierra redwoods as early as 1861, two years prior to Bierstadt's arrival. With fanfare no less than that accorded the painter, his pictures also made the rounds of major galleries in the East. [31] Bierstadt's advantage as a painter was his freedom to break with reality. Domes of the Yosemite, for instance, imparts a starkness and rigidity to the valley which imply that it is even more dramatic and magnificent than in real life. Similarly, the Indian encampment in the foreground of The Rocky Mountains draws the viewer's attention back to the peaks, whose outline, although subtle, again suggests an abruptness and boldness uncommon to most of the region. The style was in keeping with the preferences of those who needed reassurance that the mountains of the West were in fact rivals of the Alps. Bierstadt revealed his own uneasiness about the validity of such claims in a series of paintings oddly suggestive of alpine rather than western scenery. [32] In either case, his followers readily forgave his tendency to exaggerate the summits of the region; only as Americans became more self-confident about their cultural identity did their acceptance of the genre lapse into criticism. Meanwhile, if Bierstadt embellished his landscapes for dramatic emphasis, he merely copied what European masters themselves had encouraged for years regarding interpretations of their own famous ruins and buildings.......
The cure for a fallacious argument is a better argument, not the suppression of ideas.
-- Carl Sagan