On December 18, 1888, Richard Wetherill and Charlie Mason, cowboys from Mancos, found Cliff Palace in Mesa Verde after spotting the ruins from the top of the mesa.
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Ruiner af Klippboningar I Mesa Verde's Cañons, Stockholm: P. A. Norstedt & Söners, 1893.
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December: Discovery of three villages by Richard Wetherill and his brother-in-law Charlie Mason while tracking stray cattle: Cliff Palace, Spruce Tree House, and Square Tower House; now part of Mesa Verde National Park.