CHAl'.MAN — -ANCIKNT ('.ROOVED ROCKS IN ARKANSAS. 



31 



and, without doubt, the same reasons led to the selection and utiUza- 

 tion of the rock described by Lewis, for the same purpose, by the 

 Mound Builders of Dakota. Convinced that the nondescript character 

 of the forms would preclude their being accepted as symbolical, I 

 sought for some method of determining the truth or falsity of my sur- 









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mises regarding the causes thatjed to their origin. Selecting a scraper 

 and placing myself in position upon the ground, I proceeded to go 

 through the motions of shaping, sharpening, and polishing it, after the 

 ame manner the Mound Builders must necessarily have followed in 



