322 THE POPULAR SCIENCE MONTHLY. 



But there were many like finds in Neocene gravels and gravels 

 of Glacial age stretching down into Virginia and northward 

 through Pennsylvania and New Jersey. One after another these 

 gravel sites were explored by Mr. Holmes and his assistants in 

 the same manner, and in every instance it was revealed that the 

 stone objects were found in the overplacement, that in no case 

 could they be found in the underlying rocks. Objects of the same 

 character have been observed all over the United States. Within 

 the last twenty years the writer of this article has seen them made 

 by Indians in the Rocky Mountain region, and they are scattered 

 far and wide over nearly all the gravel hills of this country. This 

 creates a presumption that, where there are so many of mod- 

 ern origin, all may be modern. It has already been mentioned 

 that certain implements of this kind had been found in gravels, 

 supposed to be of Glacial age, in Minnesota. This is known as the 

 Babbitt find. Finally, Mr. Holmes, together with Prof. Winchell, 

 the State Geologist of Minnesota, visited the locality. They made 

 careful examinations, and were entirely satisfied with the evi- 

 dence that the stone objects of that site were found in overplace- 

 ment. 



Up to this stage one locality had not been examined with care 

 by the new methods — the locality in Trenton, which had espe- 

 cially become historic by reason of the many collections made 

 therefrom for sundry museums ; and this Mr. Holmes finally vis- 

 ited. The implements collected had been found mainly, perhaps 

 not wholly, along old banks of streams, and two localities of this 

 nature had furnished many of the objects of the museums. When 

 visited by Mr. Holmes and other geologists, implements could not 

 be found save in the overplacement. The principal of these sites 

 was a low bluff of gravel in the city of Trenton, and property con- 

 ditions prevented thorough examination of the site by trenching ; 

 thus it seemed that final observation by the new methods was no 

 longer possible. But at this stage the authorities of the city of 

 Trenton commenced to dig a sewer parallel to the bluff and but a 

 few steps back from its face — a deep trench to carry a large body 

 of sewage to a distance where it would no longer be noxious to the 

 inhabitants. Shortly after this work began Mr. Holmes again 

 visited the place, and returned from time to time during its prog- 

 ress, and for upward of a month kept an expert assistant watch- 

 ing the progress of the digging. With all the examination made 

 no stone implement was ever found. This led him to the conclu- 

 sion that the flaked stones originally found on the bank really 

 belonged to the overplacement and not to the foundation forma- 

 tion of Glacial age. 



In the fall of 1889 the writer visited Boise City, in Idaho. 

 While stopping at a hotel some gentlemen called on him to show 



