156 
Proceedings of the Royal Society 
seen in Mull. He referred the Convener to Mr John M‘Dougal, 
builder, Oban, as one who had a practical knowledge of granite 
rocks. 
On the hill sides facing the north and west, the Convener observed 
here and there several boulders. They were all mostly of the same 
coarse-grained granite. There was one of a purple claystone porphyry. 
When he reached “ Bal-na-Bok,” he passed several boulders of 
coarse-grained granite, and one block of mica schist, which had 
been hollowed out for some domestic use. He learnt from the old 
ferryman (MTvinnon) and his daughter, that there were boulders of 
granite about 4 feet high at or near the tops of the hills to the south 
of the ferry. Eainy weather prevented access to them. 
On returning to Oban, the Convener called on John M‘Dougal, 
the builder, and showed to him specimens of the granite boulders 
which he had found in Kerrera. On asking him if he knew where 
there were any rocks in the hills of a similar description, he said that 
he knew of two places, — one to the south of Ben Cruachan, the other 
in Morven, — and that he thought the Morven rock more nearly 
resembled the specimens shown. 
He was not acquainted with any granite exactly similar existing 
in the island of Mull. He knew very well the red granite of the 
Ross of Mull ; and he added that, at a place which he called the 
“North Bay of Mull,’' there was a grey-coloured granite, much 
lighter in colour than that in Loch Etive. 
In these circumstances, it is still matter of doubt from what 
quarter these red granite boulders in Kerrera were transported. 
(7.) The Convener next day paid a short visit to Easdale, and 
was conducted by Mr John Clerk, blacksmith, Kilbride, to several 
places in the neighbourhood, for an inspection of boulders which 
had been reported by him in one of the circulars to this Committee. 
The district visited was that traversed by the high road to Clachan 
Bridge, situated about 3 miles to the N.N.E. of Easdale. The 
rocks of this district are all a blue clay slate, extensively quarried 
for roofing. Most of the boulders examined were of grey granite, 
but their position did not indicate clearly the quarter from which 
they came. They probably came from the north or west, as there 
was less in these directions to obstruct them in their transport than 
in any other direction. 
