THE IPSWICH MAN 
217 
rather a side recess of the main valley. Messrs Bolton 
and Laughlin's brickfield is situated on the edge of the 
valley — the surface level of the plateau at this spot being 
129 feet O.D. 
At the brickfield the chalky boulder clay has become 
or Discovery 
ORI&INAL LAND i>UflFACE 
SKELETON 
BouLoea CLM 
M/O GLACIAL SANDS' 
RED CRAQ 
-ON DON CLA", 
Fig. 7 5 a.— Sketch of the valley of the Gipping to show the locality in 
which the Ipswich skeleton was found. 
Fig. 75B. — Sketch of a section across the Gipping valley to show the horizon 
of the discovery (the line of section is shown in 75A). 
reduced to a stratum of about 4 feet in depth. In parts 
it is "weathered" — the chalk and clay being altered 
in composition and appearance by exposure. That the 
stratum at the brickfield represents a direct extension of 
the great sheet of boulder clay, Mr Moir proved by sink- 
ino- a series of pits from the brickfield to the crown of" 
