COLE COUNTY
NATURAL BRIDGE CAVE
This is at the top of a bluff facing the Osage, one-half mile below the Rock Island bridge. It is only 10 feet wide and the same in height, and extends back 20 feet to a narrow passage which is almost closed by stalagmite. The site is difficult to reach, but disclosed a few fragments of pottery and some shell. The earth of the floor ascends rather steeply to the rear and contains many large rocks. It was only a camping place.
MORGAN COUNTY
SPEERS CAVE
On the Brown property, 7 miles southeast of Stover, is a reported cave, which proved to be a natural tunnel 400 feet long. The drainage from several farms passes through it from ravines above. The lower entrance is 40 feet wide and 50 feet high, the upper entrance 20 feet wide and 10 feet high.
Natural bridges and tunnels of varying lengths and widths are rather common in this part of the Osage Valley.
HOUSE MOUNDS (43)
Southeast of Stover, beginning at the edge of the town, is a group of house mounds extending over an area having a very irregular outline, but fully half a mile across in any direction. They vary from 20 to 35 feet in diameter and are scattered promiscuously at intervals of 25 to 150 feet. The surface on which they are built reaches over a succession of small knolls and ridges with slopes of 4 or 5 degrees. Most of them are along the sides of a wide, shallow valley draining northward, and of two or three small tributary depressions coming into it from either side, though a number are also to be found beyond the slight watershed which separates this drainage area from that to the southward. They exist in woods, meadows, and cultivated ground, so that some of them retain their original form, others are flattened and widened, while still others are barely traceable. Probably some have been entirely effaced by plow and harrow.