bly 12 to 15 feet in diameter.

* * * * *

At the mouth of Turkey-pen Slough, 4 miles north of Arlington, is a
terrace with steep banks on two sides, next to the river and to the
slough. On this stood a village. Three house sites are plainly marked
by the refuse around, and there may be others; vegetation is very
dense. Mussel shells and burned stones are abundant, and many flint
implements have been picked up.

[Illustration: FIG. 7.--Grooved ax from Goat Bluff Cave.]

CAIRNS AT SUGAR TREE CAMP (11)

Six miles north of Arlington is a clubhouse known as Sugar Tree Camp.
A short distance from the building is a high vertical cliff rising
almost directly from the Gasconade. The top of this cliff, near the
front, is of solid rock, almost bare of timber or brush, and in a row
along it close to the edge are seven cairns, all now so defaced that
any attempt at investigation is useless. The smallest, at one end of
the row, is of the common circular form, about 12 feet in diameter.
Three others seem to be of the same type; but their appearance may be
due to their destruction. One is shown in plate 13, a. The other
three are walled vaults. The largest, at the other end of the row, was
built up like a foundation wall of sandstone slabs. It is rectangular
in form, measuring on the outside 16 by 28 feet. All the walls are
more or less destroyed; the small portion of one remaining is shown in
plate 13, b. Two "walled-up graves" reported on the first ridge north
of Sugar Tree Camp, and one reported on the first ridge south, never
existed. There is a small cairn on a high peak half a mile east of the
camp.

TICK CREEK CAVE

In a ravine which joins Tick Creek about 2 miles from where the latter
flows into the Gasconade, and about 12 miles north of Arlington, is a
large cave known as the Saltpeter Cave.

The opening is wide and high, but the mouth and floor are much
obstructed by large fallen rocks and the bottom is constantly wet from
wall to wall with running and seeping water.

There is another entrance to this cavern around a corner of the bluff
and much higher up on its face. This opening is small and the sloping
passage from it to the cavern is almost closed in places by drip
formation.

It was never inhabited.

CAVE IN POOL HOLLOW (12)

A mile east of Newburg a ravine now known as Pool Hollow, but formerly
called "Strawhorn's" [Strawhan's] Hollow, opens into the right (north)