2 62 /-V A UTUMN. 



left such abundant traces of his presence in the 

 valley of many a European river, and also in 

 Asia and Africa, was ever likewise here in 

 eastern North America? It is precisely the 

 same evidence rude stone implements of the 

 simplest type, often but slightly modified cobbles 

 merely, that were found to be more effective by 

 having a chipped and jagged edge, rather than 

 the smooth and tapering one that water-wearing 

 produces. These same worked stones in 

 other countries always of flint, but in New 

 Jersey of argillite, a slate-like stone that has 

 been altered by heat, and possesses now a con- 

 choidal fracture these occur in the Delaware 

 gravels ; and the vivid pictures of glacial time, 

 with primitive man a prominent feature there- 

 of, that have been given by Wright, Wilson, 

 Haynes, McGee, Upham, Cresson, Babbitt, and 

 others, are doubtless familiar to all readers of re- 

 cent scientific literature. 



In associating man with ancient river valleys, 

 we are too apt to think only of the stream, and 

 ignore the surrounding country. Though largely 

 so, palaeolithic man was not strictly an amphibi- 

 ous creature ; for instance, on each side of the 

 ancient Delaware River extended wide reaches 

 of upland forest, and here, too, the rude hunter 

 of the time found game well worthy of his 

 ingenuity to capture, and so powerful that all 



