| John Wesley Powell Photographs / G14774 Grand Canyon National Park Museum Collection UPPER BOAT BEING LOWERED INTO THE RIVER AT DESOLATION CANYON. POWELL'S SECOND EXPEDITION. Circa 1871 |
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| John Wesley Powell Photographs / G14774 Grand Canyon National Park Museum Collection UPPER BOAT BEING LOWERED INTO THE RIVER AT DESOLATION CANYON. POWELL'S SECOND EXPEDITION. Circa 1871 |
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