458 The American Naturalist. [May, 
west quarter of section II, town 135, range 58, there is a large 
spring known as the “Fort Springs,” situated in the bottom of a 
deep ravine, which is about ninety feet below the fort site. It is 
probably formed by a seepage from “ Big Slough,” which starts 
about one mile south and extends some fifteen or twenty miles in 
a southerly direction. The bluff immediately to the west of the 
ravine rises to the height of about one-hundred-and-sixty feet, 
and on the top, over a quarter of a mile away in a northwesterly 
direction, there is a small knoll which was called “ Bear’s-Den 
Hill” by the Indians. On the steep slope of the bluff, about one 
hundred yards north of west from the spring and fifty-three feet 
above it, there is a large light-colored granite boulder, on which 
there are a number of incised lines, cups, and other figures. The 
base of the boulder, which is firmly imbedded in the side-hill, is 
eight-and-a-half feet in length and four-and-a-half feet in width, 
and on the side next to the spring extends out of the ground 
about three feet. The top surface on which the carvings occur is 
irregular in outline, and is seven feet two inches in length, and 
from two feet six inches to three feet ten inches in width, sloping 
slightly towards the east. The particular figures seen upon it, 
and reproduced here in fac-simile as regards their forms, are 
- explainable somewhat as follows, viz. 
Fic. 1—Apparently the horns is some animal. 
Fic. 2—A nondescript. There is a similar’ figure on the 
quartzite ledge near Little Cottonwood Falls, in Cottonwood 
county, Minn. 
Fic. 3—A crescent. This figure is often found along the Mis- 
sissippi River in Minnesota, Wisconsin, and Iowa. 
Fic. 4—A nondescript animal. 
Fic. 5.—A peculiar-shaped cross. There is one oii 
on the face of a cliff a few miles above Stillwater, Minn. 
Fics. 6, 6.—‘ Pins,” so-called. There are two of the same shape 
on the quartzite ledge, among other figures, near the “ 
Maidens,” at Pipestone, Minn. 
Fics. 7, 7, 7—Three pairs of cups, one set being joined by 4 
a ae groove, and the other two by curved gr ooves!" 
Balvraid, in Inverness- 
in tore 
‘Sir J Qi. at f isolated stone near ed grooves. 
shire, Scotland, which has five pairs of cups that are joined by straight or 
. 
