ELGEE : GLACIATION OF NORTH CLEVELAND. 
375 
The next extra -morainic channel of this kind is one at the 
foot of Turkey- Xab, near Battersby. This, Whitley Hill, has 
precisely the same characters as the preceding, but probably 
belongs to a slightly earlier stage, since it is at 500 feet cutting 
down to 475 feet. Extremely significant is the fact that no 
overflows of tliis sequence and the Boosbeck sequence occur 
between Ayton and Battersby. Yet there must have been a 
free course for the water round the Castle Hill at Easby, or else 
it would have gone into Kildale, for which, however, there is 
no evidence. On the contrary^ there must have been an outflow 
from that vaUey, of which there is no trace left, for reasons 
presentty to be assigned. 
Along the main slopes of the Cleveland Hills, as far as 
Carlton, no traces of overflows have been detected, yet a con- 
siderable body of water must have been held up. At Busby 
Hall, however, an overflow, though very shallow, crosses the 
spur there at 425 feet ; but north-west of Whorl Hill is a 
splendid example of this series of channels, cutting from 
300-250 feet. It falls to the east, however, and may have been 
produced at a later stage by a temporary flow of Swainby Beck 
in that direction. To the south-west of the village, and in front 
of the great moraines blocking up the entrance to Scugdale, 
is a shallow, wide trench in the drift, whicli looks like a 
glacial drainage channel, but it may owe its origin to Carr 
Beck, a fact rendered • more probable by the course of Swainby 
Beck, which just crosses the low watershed between these two 
channels. Its so doing excludes the possibilit}?- of its having 
travelled at any time along the Carr Beck Valley, which must 
have happened if this had really been an extra-morainic 
channel. 
I have not yet been able to discover any other signs of the 
Vale of York drainage between the foot of the hills and the course 
of the Leven, north of which the ice halted for a considerable 
time and deposited great moraines. 
We have now to consider a rather peculiar problem. At 
the entrance to Kildale, as already remarked, there exist no 
overflows indicating a line of drainage into the Vale of York. 
