Copyright: Public Domain Date Added: 2010/12/14

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• Engravings of Prehistoric Specimens from Michigan, U.S.A.
• The Prehistoric Finds of Michigan

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Caption

26. Black Slate - Savage Collection.
Near Grayling, Crawford Co., Michigan, August 9, 1909.

27. Copper - Savage Collection.
Near Grayling, Crawford Co., Michigan, July 8, 1909.