West Wall of the Canyon, Yellowstone — Thomas Moran, American, b. Britain, 1837–1926West Wall of the Canyon, Yellowstone — Thomas Moran, American, b. Britain, 1837–1926West Wall of the Canyon, Yellowstone — Thomas Moran, American, b. Britain, 1837–1926West Wall of the Canyon, Yellowstone — Thomas Moran, American, b. Britain, 1837–1926