THE DA WN OF MIND 179 



implements are found, the rough and the smooth, 

 or the unground and the ground. For a long 

 period the idea never seems to have dawned that 

 a smooth stone made a better axe than a rough 

 one. Mind was as yet unequal to this small dis- 

 covery, and there are vast remains representing 

 long intervals of time where all the stone imple- 

 ments and tools are of the unground type. Even 

 when the hour did come, when savage vied with 

 savage in putting the finest polish on his flints, 

 his inspiration probably came from Nature. The 

 first lapidary was the sea ; the smoothed pebble 

 on the beach, or the rounded stone of a mountain 

 stream, supplied the pattern. There is no question 

 that the rough stone came earlier than the ground 

 stone. Thus the implements of the Drift Period, 

 those of the Danish Mounds, the Bone Caves, and 

 the gravels of St. Acheul are mostly unground, 

 while those of the later Lake-Dwellers are almost 

 wholly of the smooth type. 



To follow the Stone Age upward into the Bronze 

 Period, and from that to the Age of Iron, is not 

 necessary for the present purpose. For at this 

 point the order of succession passes from shell- 

 mound and crannog, into living hands. There are 

 nations with us still who have climbed so short a 

 distance up the psychic scale as to be still in the 



