KANSAS ACADEMY OF SCIENCE. 17 



rising two stories above its summit, and completing the circle or oval upon 

 the surface of the bluff. This circle is 225 feet across in one direction, say 

 east and west, and seventy in the other, with one opening or passage, say six- 

 teen feet wide, leading down the face of the bluff on the northern side, and 

 one into the iuclosure on the east. 



This area contains two basin-shaped, stone-lined reservoirs, probably for 

 water, twenty-five feet in diameter and more than six feet deep (2), as was 

 proven by digging into them to that depth without finding the bottom of the 

 stone lining. They are filled with earth to within some three or four feet of 

 the surface. Outside of the circle of huts, at the foot of the blufi" on the north 

 side, but inside of the stone wall above named, are two similar stone-lined, 

 basin-shaped reservoirs, sixteen feet in diameter, and filled within two or 

 three feet of the surface. (3.) One of these is on each side of the passage-way 

 before mentioned A very singular thing is, that the western of these res- 

 ervoirs seems to be connected with one of those inside by an aqueduct or 

 conductor, constructed wholly of cement* made of ashes and some other 

 substance, possibly lime, though no lime or cement of any kind is found in 

 any other part of the works. 



This aqueduct is exposed at the margin of the reservoir nearest the bluff, 

 and is at least two feet in diameter, with walls not less than eighteen or 

 twenty inches in thickness. It was constructed by making lumps and blocks 

 of the cement, some rounded and some flat, varying from four to ten inches 

 in diameter, and laying them upon each other like bricks, and fastening them 

 together with layers of similar cement, and finally smoothing the whole over 

 with a coating of the same. I had no implement but an old hatchet, and 

 could do but little in the way of excavating this aqueduct, and may have 

 been mistaken as to its object and purpose; but from its locality and shape, 

 as disclosed by my cutting into it some two feet or more, I think I am cor- 

 rect. 



Adjoining the inclosure above described on the east, is a small one, also 

 built around with similar stone huts, two stories high, which is about sixty 

 by seventy feet in diameter, and has two gateways, one to the northeast and 

 the other to the southeast, each ten feet wide and thirty-six feet long. To 

 the southward of both of these iuclosures, and close to the rocky declivity, 

 which is bold and commanding, are several remains of walls and buildings, 

 nothing being left but the foundations and some loose rock. The fir^ or 

 western of these is 24x58 feet, the second 24x27, and the third 10x30. Still 

 further east, and on the extreme point of the rock, is a triangular-shaped 

 inclosure 54x69, the third side being made by the wall on the edge of the 

 bluff. From the situation of these (5), especially the last named, they were 

 evidently for the purposes of outlook and defense. 



Just east of the huts last described, the ground slopes rapidly to the east 



*The Mineralogist of the Smitlisonian Institution reports that this cement "is composed of silicai 

 carbonate of lime, and carbonate of magnesia, with a trace of iron." 



