Investigation of Mound D revealed that the following sequence of events
had taken place. A round, Caddoan type of house (House No. 4) with an
extended entranceway on the west side was built in a shallow, excavated
pit on the south bank of Cypress Creek. Architecturally the house was
quite similar to those at Mounds B and C. Sand was probably banked
against the outside wall of the house to a height of somewhat more than
a foot. After an unknown period of time the house was destroyed by fire,
and then the house remains and the surrounding embankment of sand were
buried beneath a mound of sandy soil. This duplicates essentially the
events reconstructed for Mounds B and C, the only unique feature at
Mound D being the pit in which the house was built.
[Illustration: Fig. 10
HARROUN SITE
41 UR 10
PLAN OF HOUSE NO. 4
MOUND D
post mold
unexcavated
burned area
pothole]
Probable ceremonial burning, burial beneath a mound, and a scarcity of
domestic artifacts and refuse suggest that House No. 4 was not an
ordinary residence, but a small temple, chapel, or similar structure
used for ceremonial purposes.