250 Proceedings of the Royal Society 
. Professor Duns having landed on this island in a previous year, had 
noticed several boulders, and suggested that I should visit it. I 
found on it four or five grey granite boulders, the rock of the 
island being entirely conglomerate. One or two of the boulders 
were in positions indicating probable transport from the north. 
I proceeded next round the north end of Kerrara Island as far as 
Bal-na-bok Bay ; landing, on my way there, at parts of the shore 
where boulders were observable. At the north end of Kerrara, 
where the rocky cliffs of conglomerate reach a height of about 100 
feet, I found four or five large boulders of granite, all grey but one, 
which was red. Their position close to these high cliffs suggested 
that they had come from some northern point, and had been inter- 
cepted there. 
On a small island near the same place, there is a grey granite 
boulder, 8x5x4 feet, and in such a position as also to indicate 
transport from the north. 
On reaching Bal-na-Bok, I found the shepherd and his daughter 
(M‘Kinnon) very willing to guide me across the hills, and point 
out a number of boulders known to them. Accordingly, in the 
course of a three hours’ circuit among hills about 300 feet above 
the sea, I examined about twenty boulders, all granites except one, 
which was a greenstone. Some of the granites had a pinkish tinge 
of colour. Most of the boulders were lying with their longer axis 
N. and S., but there was nothing in their positions to show from 
which quarter they had come. 
The late Robert Chambers (Edin. New Philosoph. Journal for 
1853, p. 254), mentions having seen in Kerrera Island “numerous 
smoothed (rock) surfaces dipping into the sea, with striations from 
N. 60° W., being nearly the same direction as Mr Maclaren’s 
W.N.W.” I did not fall in with any of these. He mentions 
“ that on the high grounds above Tobermory, in Mull, there are 
striae pointing from N. 60° W.” 
3. Having been informed of a large boulder on the hills on the 
south side of the road between Oban and Connal Perry, on the farm 
of Dunbeg, I called on Mr Brown the tenant, and induced him to 
guide me to the place. The hill-slopes here face the north, and 
the boulder was on one side of a niche in this range of hills. The 
Linnhe Loch is on the north side of the range. 
