588 Proceedings of the Royal Society 
cottage. The boulder was in two pieces, having evidently been 
broken by some natural agency. Before it broke, it must have 
measured in length 52 feet, in width 36 feet, and in height 20 
feet, containing 1387 cubic yards or about 2770 tons.* 1 It was ex- 
tremely angular in shape. Its narrowest end was to the west. 
This immense boulder was at the foot of what was evidently an old 
sea-bank, whose base is about 40 feet above the sea at high water. 
The bank is about 35 feet in height, and consists chiefly of gravel 
and boulders. 
Fig. 5 on plate XVIII. is intended as a sketch from memory of 
this spot, AAA being the old sea-bank, B the large boulder, and CD 
the high road along the south shore of Loch Killesport. 
Along the line of this old sea-bank, there were great numbers of 
boulders above it and at its base. The measurements of a few may 
be given. A boulder at base of the bank, measured 23 x 14, lying 
E. and W. ; another measuring 20x12x10 feet, lay on the slope 
of the gravel bank, which here faces W.S.W. 
Another boulder on top of bank measured 24x16x13 feet; and 
another 18x10x8 feet, lying on gravel with its sharp end to the 
W.KW. There were about twenty more, smaller than these, 
scattered on the fields above the old sea-bank. 
At a little distance from the top of the bank, I found a rock of 
mica schist well smoothed, with striae running E. by X. and W. by S. 
Xear the village of Ballibayach, in a field to the north-east, there 
is a gneiss boulder, 33 x 18 x 12 feet, resting on a smoothed rock of 
mica slate, which slopes down towards the west. This boulder 
weighed probably above 400 tons. Along the range of hills and up 
to their summits, at a height of about 600 feet above the sea on the 
south side of Loch Killesport, numerous boulders were seen from the 
road ; but I was prevented going to them. 
About 3 miles to the east of Ormsary, the road passes through the 
narrow valley of Auchloss, which runs in a direction about east and 
west. Smoothed rocks occur in this valley, on one of which Mr 
Alexander pointed out striae running in a direction W. by X. 
* In the “American Journal of Science and Arts” for 1877, reference is 
made to a boulder in Vermont, called “ The Green Mountain Giant,” weighing 
about 3400 tons ; and to twelve still larger in New Hampshire — the largest 
measuring 62 x 50 x 40 feet, and estimated to weigh nearly 6000 tons. 
