480 ARCHEOLOGICAL INVESTIGATIONS—II [PTH. ANN. 44 
und west sides of chamber B, is shown in Figure 15. The bedrock is 
somewhat higher near the middle of this section than toward either 
side; the shale, with practically a uniform thickness of 5 inches, 
has a corresponding slope of its upper surface. 
From this middle line the dip to the eastward continued. At 
10 feet it became apparent that the clay would soon run out, allow- 
ing the loess to rest upon the shale, or perhaps upon the bedrock, 
and it was deemed not worth while to go any farther. 
The loess in chamber B was more compact and tenacious than 
any previously excavated; so much so that the upper portion was 
almost as hard to remove with picks as the surface of a much- 
traveled dirt road would be. No fragments of stone were found 
in it; only two or three pieces of charcoal, and very few snail shells. 
A fragment of human jaw had been found by the Concannons 
a few inches above the rock floor in the west wall of the tunnel 
some 15 feet northwest of the skeleton, and 
at first was supposed to belong with it. 
More careful examination and comparison 
revealed the fact that it was part of a differ- 
ent individual, indicating, perhaps, another 
burial. 
This was a matter of sufficient importance 
to call for a thorough investigation. A cut 
8 feet wide, 4 feet in each direction from the 
point at which the jaw was unearthed, was 
carried westward 1114 feet. No trace of the 
Fic. 15—Section in shale or the blue clay was discovered in this 
chamber B : . 
chamber (C in the diagram). Some loose 
stones were strewn here and there on the floor, but except for these 
nothing intervened between the loess and the bedrock. Various sandy 
streaks, as of lamination, appeared in the upper part of the excava- 
tion, but so slightly marked that they were difficult to trace. Those 
most plainly shown had a slight dip toward the south, being 3 or 4 
inches higher at the north wall than on the other side of the cut. 
They became fainter until they disappeared within a short distance ; 
but toward the end of the chamber a few others came in, quite dis- 
tinct, though limited to a width of 3 or 4 feet. 
As noted in several reports made previously by visiting investi- 
gators, a clay streak about an inch thick extends along the west side 
of the tunnel from the doorway to the extreme end and apparently 
continues indefinitely in the same direction. This streak gradually 
rose toward the west, growing continually thinner, until, at about 
8 feet within the chamber (C) and some 2 feet above its level in the 
tunnel, it could no longer be discerned. 
