August 19, 1873
William Henry Jackson photo: Upper Twin Lake
William Henry Jackson Upper Twin Lake photograph Lake County, Colorado 1873 Image was taken before the expedition crossed Red Mountain Pass into Taylor Park
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August 19, 1873
William Henry Holmes sketch: Upper Twin Lake
William Henry Holmes View of Upper Twin Lake pencil on paper Colorado, 1873 Courtesy of the US Geological Survey, Department of the Interior/USGS, US Geological Survey, Drawing by William Henry Holmes.
August 19, 1873
William Henry Holmes sketch: Panoramic View of upper and lower Twin Lakes
William Henry Holmes Panoramic View of upper and lower Twin Lakes pencil on paper Colorado, 1873 Courtesy of the US Geological Survey, Department of the Interior/USGS, US Geological Survey, Drawing by William Henry Holmes.
August 19, 1873
William Henry Holmes sketch: Panoramic View of upper and lower Twin Lakes
William Henry Holmes Panoramic View of upper and lower Twin Lakes pencil on paper Colorado, 1873 Courtesy of the US Geological Survey, Department of the Interior/USGS, US Geological Survey, Drawing by William Henry Holmes.