Clark: September 2, 1804

2nd of Sept. Sunday 1804Set out early & proceeded on passed the
Island & Came too above below a yellow Bluff on the S S. the Wind
being hard from the N W. verry Cold Some rain all day much Thunder &
lightning G Drewyer R. Fields Howard & Newmon Killed four fat Elk on
the Isld. we had them Jurked &the Skins Stretched to Cover the
Perogues water riseing, I observe Bear grass & Rhue in the Sides of
the hills at Sunset the wind luled and cleared up coolAired the
meet all in high SpiritsShannon & the man Sent after him has
not yet joind us

2 Sepr. description of a antient fortification

(1) From the river on the top of the antient fortification at this the 12
foot high 75 feet Base first Corse is from the river is S 76° W 96 yards.
S 84° W. 53 yds. at this angle a kind of ravilene covering a Saleport,
bearing East widing N 69 W 300 yds. passed a gate way at 280 yds. the bank
lower & forming a right angle of 30 yardstwo wings or mounds
running from a high nold to the West of the way one 30 yards back of the
other Covering the gate (at this place the mound is 15 feet 8 Inches
higher than the plain forming a Glassee outwards & 105 feet base N. 32
W. 56 yards N. 20 W. 73 yards this part of the work is about 12 feet high,
leavel & about 16 feet wide on the top) at the experation of this
course a low irregular work in a Direction to the river, out Side of which
is several ovel mounds of about 16 feet high and at the iner part of the
Gouge a Deep whole across the Gauge N.

32 W 96 yds. to the Commencment of a wall of about 8 feet high N.81° W.
533 yards to a Deep pond 73 yds in Deamuter, and 200 yards further to a
Saleport, where there is evident marks of its being Covered, the Same
Course Contined 1030 yards to the river bottom.

One half of the first part of the Fortification is washed into the river,
a Second line, has run from the Northrn extremity parrelel with the river
(as it appears to have run at that time) N. 56 W. this of different hith
from 4 to to 10 feetThe high land is about 3 me. from this
fortress, and rise to Small mountains Say from 3 to 400 feet the high land
on the opposit or North Side of the Missourie is 110 feet forming a yellow
Clay bluff to the water and is leavel back as fur as can be Seen. I am
informed by the inteperter & french, that they have Seen, numbers of
those fortifications in different parts of this Cty. pirtcularly on the
Platt Kansies and the North of this place on the river Jacque.

two Small fortifications is on the Arc Creek on the upper side 1st 1/4 of
a mile up & the 2d 1/4 higher, nearly Square each angle 100 yards

—

2nd September Sunday 1804 Set out early and proceeded on Passed the Island
and Landed on the S. S above under a yellow Clay bluff of 110 feet high,
the wind blew verry hard a head from the N. W. with Some rain and verry
Cold, G. Drewnyer R. Fields Newman & howard Killed four fine Elk we
had the meat all jurked and the Skins Dried to Cover the Perogue, on the
Side of the Bluff I observed Bear Grass & Rhue, at Sun Set the wind
luled and Cleared up Cold, the high land on the L. S. is verry high, &
uneaven, that on the S. S from 80 to 120 foot & is leavel back but
fiew Small Streems falling into the river.

I went out and made a Survey of the antient works which is Situated in a
level plain about 3 miles from the hills which are high.

A Discription of the Fortification

(1) Commenceing on the river opsid the Good Mans Island, first Course from
the river is

S. 76d W. 96 yards thence

S. 84 W. 53 yards (at this angle a kind of angle or horn work)

N. 69 W. 300 yards to a high part, passing the gateway Covered by two half
Circler works one back of the other lower than the main work the gate
forms a right angle projecting inward

N.32 W. 56 yards

N 20 W. 73 yards This part of the work appears to have either double, or a
covered way. from this Some irregular works appear to have been on mounds
between this and the river with a Deep round whole in the center of a
gorge formed by another angle (578)

This part of the work is from 10 to 15 feet 8 Inchesthe mounds of
various hightsthe base of the work is from 75 to 105 feet, steep
inward and forming a kind of Glassee out wards

the Same Cours continued i e

N. 32°W. 96 yards to the Commencement of a wall from 8 to 10 feet high
this corse not on the wall but thro to the commencment of another detached

N. 81° W 1830 yards to the river & above where this bank Strikes the
river is the remains of a Circular work

in this Course at 533 yards a Deep Pond of 73 yards Diameter perfectly
round is in the Course of the bank which is about 8 feet high, from this
Pond the bank it lowers graduallya bank about the Same hight runs
near the river, and must have joined the main work at a part which is now
washed into the river, this is also perfectly Streight and widens from the
main work, as the river above has washed in its banks for A great distance
I cannot form an Idear How those two long works joinedwhere they
Strike the river above, they are about 1100 yds apart, I am informed by
our freench interpeters that a great number of those antint works are in
Different parts of this Countrey, on the Platt River, Kansus, Jacque,
Osarge Mine river &c.

Small one is on Island opposit the one I have Discribed, and two of our
Party Saw two of those antient frtresses on the Pittiet Arc Creek on the
upper Side near the mouth, each angle of which were 100 yards and about 8
feet high-