300 



H. Bingham — Discovery of Pre-Historic 



the inhabitants Incaic, I was at ones struck by the idea that 

 this kind of wall must be very much older than we should be 

 led to suppose by our present ideas of Inca civilization. Such 

 a thesis would be necessary to account for a wall completely 

 covered over to a depth of six or eight feet by a compact 

 gravel bank, a bank later eroded to a depth of ten feet. Fur- 



Fig. 3. 



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mi 







■Vy*r'. -t4t».*-. -*-' 





Fig. 3. Portion of buried wall after partial excavation. 



ther investigation in this part of the gulch revealed numbers 

 of potsherds and bones. 



A few days later I followed the Ayahuaycco quebrada up 

 to its head, using a road on its east side. In various places I 

 was struck by evidences of ancient civilization. Ash-heaps, 

 recent and ancient, a stone-paved area which may have been a 

 threshing floor or market place, and numbers of bones and 



