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Proceedings of the Royal Society 
6. On the hills north of Tarbert there are many unmistakable 
signs of a N.W. current up to the highest level which the Convener 
was able to climb to, viz., 800 feet above the sea. 
(a . ) There are multitudes of knolls or bosses of rock, rounded and 
smoothed on their west sides, but rough on their east sides. There 
are none which show opposite markings. 
( b .) There are many cases of boulders lying in such a way as to 
show that they had been stopped there in their progress eastward. 
One example is given in fig 28, where hard gneiss rocks had been 
rounded and smoothed from the westward, and a number of boulders 
— several of granite — were lying at the base of these rocks. A 
westerly current, if it smoothed the rocks, might have also brought 
the boulders. 
(i c .) At Avon Sue, or Fincastle, the handsome mansion-house of 
Mr Scott, banker, London, on the sea-shore about 11 miles west 
from Tarbert, the following observations were made : — 
A little way up the hill, above the stables, a striated rock was met 
with. The smoothed rock sloped down towards the sea in a direction 
S.S.E. Three ruts on this smoothed surface when measured were 
found to be from 18 to 23 inches long, and about 2 inches wide 
Their direction was due east and west. The ruts were deepest and 
widest at the west end. In consequence of the direction in which 
the smoothed rock sloped, a H.W. current, coming against it, 
would be diverted into a direction nearly due east. The lines of 
the ruts in that direction ran up on the rock surface at an angle of 
about 8° or 10°. 
On this hill slope there were several boulders whose position in- 
dicated clearly that they had come from the westward, — that is, 
from the sea. These proofs were the same as those explained in 
regard to other cases (see figs. 10 and 12), and therefore need not be 
repeated here. 
IX. — ROAD FROM TARBERT TO STORNOWAY. 
1. Where the road leaves the sea and strikes north there are 
enormous boulders, partly buried in drift, on the west flanks of 
the hills. This road reaches its summit level at about 650 feet 
— a distance of about 2 miles. The valley is narrow, between 
ranges of high hills on each side, and runs in a direction E.N.E. 
