368 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. 
About a quarter of a mile W. of 
this place, on the Billing road, at n, 
in digging out cellars for houses, a 
section of about 12 to 14 feet has 
been exposed, cut through a con- 
tinuation of the ironstone beds of the 
Asylum section. 
About midway of the section is 
a shelly zone about 8 or 10 inches 
in thickness, in which Lime of seve- 
ral species (generally large) are very 
abundant, and indeed almost the only 
shells. Ata level a little above this 
zone, corals (Thamnastrea and Lato- 
meandra Davidsont) occasionally oc- 
cur. The soft white material of the 
last section is also found here. 
Very near to the last spot, in Frith- 
street, at 0, in excavating for build- 
ing, several years ago, a section was 
opened analogous to the Asylum sec- 
tion, and containing very shelly 
zones. At a few feet from the top, 
a zone of coral (Thamnastrea), fre- 
quently in large masses, was found. 
A similar zone was broken through, 
a short time since, in making a culvert 
in St. Giles’s Street (~), and was here 
locally associated with Pinna cuneata 
and Gervillia acuta. Similar coral has 
been found at an intermediate point. 
The junction of the Northampton 
Sand with the Upper Lias clay has 
produced in the town of North- 
ampton many springs of ancient re- 
pute, such as Scarlet Well (in the 
old dyers’ quarters), King’s Well, St. 
John’s Well, Becket’s Well (named 
in medieval times in commemora- 
tion of the last interview between 
Henry II. and the Archbishop, held 
at Northampton in a.p. 1164), and 
Nine Springs Head. The Water 
Company draw their supply chiefly 
from the Marlstone by a well, 168 
feet deep, starting from a level about 
midway of the Asylum section. 
Fig. 4.—Section from Duston to Dallington. 
Dallington 
Field 
Dallington and 
Harlestone 
Heath 
ngton 
= 
rook. 
Duston Dall 
“Old” pit. Br 
its. Wells. 
pl 
Duston 
Duston Brick Iron- 
Up- stone 
Works. 
per Lias clay. 
For explanation of letters see fig. 2. 
