174 Proceedings of the Royal Society 
At the top of the hill, about 660 feet above the sea, several 
boulders were found, the largest being 4x3x3 feet. These boulders 
were resting on a bed of sandy clay, and on a slope of the hill facing 
west by south. The west side of the boulders was well rounded, 
as if ground down and smoothed by the friction of bodies passing 
over it from the west. 
All the rocks exposed on the hills here, up to the summit level of 
the road, which reached about 927 feet above the sea, showed 
smoothings on their west sides. 
The whole of Glen Urquhart has evidently, at some former period, 
been choked with drift. Beds of gravel, clay, and sand still remain 
on the hills on each side up to the very top. Hence, probably, the 
luxuriance of vegetation which this beautiful glen manifests. 
On the north hank of Loch Hess, about half a mile to the east of 
Urquhart, a number of conglomerate boulders lie on the hill side. 
In walking up the hill the Convener counted six, of which the 
largest was 7x5x4 feet, from a level of 200 feet to a level of 800 
feet above Loch Hess. 
The rocks of the hill here are gneiss, so that these boulders have 
been brought to where they now lie, most probably from Mealfour- 
vounie, which consists entirely of conglomerate rock, and is situated 
a few miles to the west. 
One of the boulders is at a height of 340 feet above Loch Hess, 
which corresponds with the line of an old horizontal terrace, visible 
along the south bank of Loch Hess to the eastward. 
At the height of 450 feet above the loch, deep beds of a fine 
sandy clay occur, just above the landing pier at Urquhart. 
XVII. — PORT AUGUSTUS. 
On the Corryarrick road (about two miles S.W. of the town) one 
boulder was noticed which seemed to indicate the direction in which 
it had come. Big. 46 shows this boulder of grey gneiss lying on a 
steep bank of gravel at the base of a rocky cliff, which is a buff- 
coloured felspathic rock. The slope of the hill is towards H. W. The 
boulder, therefore, probably came from that direction. It happens 
to be at the same height above Loch Hess (viz., 207 feet) as the 
lowest of the conglomerate boulders above mentioned seen to the 
east of Urquhart. 
