Obsidian knife from Yampa Canyon cave typical of artifacts found in Mantle Cave. University of Colorado Museum, Boulder, Colorado

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  Fish hook and line from cave in Yampa Canyon. Now in University of Colorado Museum, Boulder, Colorado. Typical of artifacts found in Mantle Cave

  Manuscripts

  mssMarston papers V112/0017

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  Basket from Yampa canyon cave, now in University of Colorado Museum, Boulder, Colorado. Typical of artifacts found in Mantle Cave, Mile 11

  Manuscripts

  mssMarston papers V112/0018

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  Headdress and necklace from Mantle Cave; University of Colorado Museum, Boulder, Colorado

  Manuscripts

  mssMarston papers V112/0020

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  Mantle Cave? Mile 11. Dinosaur National Monument [photo reverse: Yampa canyon cave]

  Manuscripts

  mssMarston papers V112/0016

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  Mantle Ranch in Hells Canyon of the Yampa River; Mile 11.8

  Manuscripts

  mssMarston papers V112/0011

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  University of Colorado preparing for embarkation on the Yampa in Hatch baloneys [on photo reverse: U of Colo alum group off to a wet start down the Yampa with Hatch

  Manuscripts

  mssMarston papers V112/0005