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The group included geographers, explorers, teachers, lawyers, cartographers, military officers, and financiers all learned, well-traveled men distinguished by a love of knowledge and a thirst for discovery and achievement. As one of them pointed out, they were the "first explorers of the Grand Canyon and the Yellowstone, those who had carried the American flag farthest north, who had measured the altitude of our famous mountains, traced the windings of our coasts and rivers, determined the distribution of flora and fauna, enlightened us in the customs of the aborigines, and marked out the path of storm and flood."
  
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