14 BUREAU OF AMERICAN ETHNOLOGY [BULL. CG 
There is not the slightest thread on which I am able to hang any positive 
tiouht, save the arch of material over the bones. It was at first thought to be 
either the natural arch of the top of a grave or a dividing plane between an 
earlier and a later deposit, and that the bones lay in the outer, later deposit, 
made long after the glacial period. The former hypothesis proved to be un 
tenable, because the gravel became firm before the bones were reached, while 
excavating downward from the crack. In testing the latter hypothesis, a simi 
lar difficulty arose. No break could be found between the stratified gravel of 
figure 5 and the stratified gravel in the steepest part of the bluff. Although a 
search was made for signs of a break, showing that erosion was followed by 
alluviation, and for facts showing that the fill material contained the bones, 
nothing conclusive or even suggestive could be found. 
Dr. Eaton s report on the bones, human and animal, in his part of 
this first publication on the Cuzco finds is both careful and cautious. 
As to the human bones, he rather dissonaiitly concludes that 
It is clear that no proof of great antiquity can be drawn from the characters 
of the human skeletal parts submitted to me, agreeing as they do in all essen 
tial respects with the bones of a recent people. Until additional skeletal ma 
terial is obtained showing characters more primitive than those already noted, 
the burden of proof of great antiquity must rest on geological and paleonto- 
logical evidence. 
With regard to the animal bones, Dr. Eaton arrives at this time at 
no definite conclusion as to the exact species they represent or their 
antiquity ; there is need of further comparison. 
In 1912 the work of the Yale Peruvian Expedition was resumed. 
This time the expedition was accompanied by Prof. Herbert E. 
Gregory as geologist, and considerable time was devoted to a critical 
study of the Cuzco gravels. Dr. Eaton also accompanied the ex 
pedition as osteologist for the purpose of making needed local 
comparisons. The results of the season s work proved of consid 
erable importance, particularly in relation to the human and animal 
remains recovered the year previous from these gravels. The report 
of the work, published in The American Journal of Science in July, 
1913, 1 presents a number of highly interesting and satisfactory con 
clusions. 
Professor Bingham, to whom American anthropologists must be 
grateful for having done everything in his power to ascertain the 
exact truth concerning the Cuzco remains, contents himself, in his 
brief prologue, with the statement that &quot; while the results are not 
as exciting as some people wish they were, it is a great satisfaction 
to me to have been able to get to the bottom of this interesting 
problem.&quot; 
1 The Investigation of the Prehistoric Human Remains Found Near Cuzco, Peru, in 
1911, by Hiram Bingham ; Vertebrate Remains in the Cuzco Gravels, by George F. 
Eaton ; The Gravels at Cnzco, Peru, by Herbert E. Gregory. Amer. Journ. Sci. } 4th 
ser., vol. xxxvi, pp. 1-29, New Haven, July, 1913. 
