THOMAS. | CONCLUSIONS. 109 
Quatrefages may not be correct in fixing the date of the appearance 
of the “Red skins” in the “basin of the Missouri” in the eighth or ninth 
century,' but nothing has been found in connection with the ancient 
works of this country, supposing the Indians to have been their au- 
thors, to prove that he has greatly erred in his calculation. Other 
races or peoples may have preceded the mound-builders in this region, 
but better proof of this is required than that based on the differences 
between the supposed palolithic and neolithic implements of New 
Jersey and other sections, as every type discovered can be duplicated 
a hundred times in the surface finds from different parts of the country. 
Eighth. That all the mounds which have been examined and eare- 
fully studied are to be attributed to the indigenous tribes found in- 
habiting this region and their ancestors. 
'The Human Species, English translation, p. 307. 
