I. Bowman — A Buried Wall at Cuzco. 499 



fig. 6. Both the face toward the ravine and the face in con- 

 tact with the gravel consist of cut stone. 



(3) The wall is covered at one point with six feet of stratified 

 gravel. Stratified gravel also faces the ravine side of the wall 

 at " A," fig. 2. 



(4) On the down-slope side, fig. 6, stratified gravels may also 

 be seen abutting sharply against the wall wherever portions of 

 it were removed. 



(5) The wall does not now conform to the alluvial grade of 

 the surface of the deposits in which it lies buried, nor to the 

 gradient of the ravine floor, being less steep than the surface 

 of the alluvium and steeper than the present channel. 



(6) The deposits in which the wall is buried form part of a 

 great series of deposits with comparable physiographic features, 

 equivalent ages, and definitely determinable origin. 



(7) The definitely known Inca buildings stand upon alluvial 



Fig. 2. 



Fig. 2. Cross-section of belt of alluvium bordering the hills southwest of 

 Cuzco. The former undissected slope and its relation to the buried wall 

 are also shown. A and B represent the relation of the eastern border of 

 the ravine with respect to the wall at two stations. 



slopes now in process of dissection ; not as in the case of the 

 wall, below the level of the alluvial surface. 



"We shall now inspect the facts indicated above to ascertain 

 their nature and then examine their bearing on tbe question of 

 a pre-Inca race. It is uot proposed to draw hard and fast con- 

 clusions. Such conclusions can be formulated only when much 

 more field work, particularly in the way of excavation, has 

 been done, and a larger amount of archeological data gathered. 

 On the other hand, it is not proposed to present mere facts 

 alone, and to shirk the responsibility of interpreting them. 



At first sight the buried wall appears to be directly related 

 to the present drainage. It forms, for a part of its length, a 

 sort of lining to a channel along which water is now at times 

 conveyed. Imagining small changes in stream volume from 

 time to time, one reaches the temporary conclusion that in 

 times of high water a deposit would form on the inside (stream 



