EXCURSIONS. 
419 
During the drive back to Richmond a halt was made near 
Kirby Hill, at the point which was indicated as being the water- 
shed of the Tees and Swale. It was certainly very low, and 
looking over the Gilling Valley it did seem as if it were too broad 
to have been produced by the stream that now runs through it. 
The possibility that this might be a true explanation of the 
facts was admitted, but the generally expressed opinion was 
that though this was a possible case of river diversion, yet that 
it would be safer to wait for further facts before arriving at a 
final conclusion. 
On Saturday morning the members walked to the Corpora- 
tion Quarry, near the barracks at llichmond, where a Grey 
Limestone is exposed. This forms a part of the so-called " Red 
Beds." From the hill above the quarrj^ a fine view over Rich- 
mond, with its fine Norman castle, and also of the distant hills, 
flanking the Swale Valley, was obtained. 
A quarry near the racecourse was then visited, where a 
bed of chert occurs in the limestone and the limestone itself 
contains much gritty matter. 
The walk was then resumed by way of Willance's Leap 
and thence down the hill to a British encampment in a wood 
at the foot of the cliff. 
Near the monument many fossils were collected, including 
fish teeth. 
These teeth belong to the cartilaginous group of fishes, 
which accounts for the fact that no remains other than the 
teeth and a few dorsal spines are preserved. 
The view looking up Swaledale from Willance's Monument 
is one of the finest in the dale. Throughout this section of 
its course the river is still cutting in glacial drift, having as 
yet failed to clear its valley of the accumulation of loose 
materials produced during the Glacial Period. 
The Swale Bridge was then crossed, and the return journey 
was by the right bank of the river. Several quarries in the 
Main Limestone and Red Beds were examined en route, and an 
interesting dry valley of great depth and probably of glacial 
origin, lying behind Round How, was traversed. Opposite 
Round How the present valley of the Swale is much obstructed 
