149 
across the valley near the Brick and Tile Works, showing 
the position of the patch of Till and the bottom of the valley, 
above 320 feet in depth, which is a watershed on a flat more 
than a mile in length, free from Till, so far as our observa- 
tion went, the greater part of the water flowing to the 
German Ocean, but some little finding its way down to the 
Irish Sea. That Till did once occupy the bed of this valley 
near the Brick and Tile Works is pretty certain, or else the 
deposit on the sheltered hill side would scarcely now remain 
to tell its tale. 
There can be little doubt of the valley of Todmorden, at 
least that part of it at the summit is an ancient one, formed 
long anterior to the period when the Till was deposited, and 
that the latter once occupied it and was afterward swept 
out on the rising of the land, as is probable from the small 
patch left near to the Brick and Tile Works. 
Concluding Remarks. 
From the sections of drift given in this communication it 
is clear that these deposits lie on a very irregular surface of 
underlying carboniferous and triassic rocks, for, while we 
find little or no drift on strata only 205 feet above the sea 
level at Rainhill; at Tandle Hill, near Three Gates, above 
35 miles to the north-west, we find 510 feet of drift on Coal 
Measures at an elevation of 233 feet ; and, again, 12 feet of 
that deposit at an elevation of G50 feet near the Rochdale 
Brick and Tile Works at Summit. 
How it is that the drift does not reach to so great an 
elevation at the southern entrance of the Todmorden valley 
as it does at the places 1,300 or 1,400 feet high, shown in 
the first part of these notes, is difficult to account for, with- 
out we suppose that the land in the former case has not 
been raised so much as in the latter since the deposition of 
the drift, or, what is more probable, that the latter has 
been removed since. 
