of Edinburgh, Session 1880 - 81 . 
265 
Those which are granite are (in my opinion) foreign to the 
island, being of a lighter colour than the rocks of the island. By 
some unknown means, they have been brought to where they 
now lie. 
(4.) There are boulders of granite, whinstone, and quartz. Those 
of granite are generally on hill tops. 
Those which I mostly noticed, are lying on hill tops and slopes of 
hills. There are also a number along the shore, on the west side of 
the island. 
(5.) The boulders like paving-stones are mostly on the north and 
west sides of the island, along the shore. 
They are all rounded, and of an oblong shape generally, from the 
size of fine gravel, till some would rank amongst boulders. The 
highest bank of these heaps of paving-stones above the sea shore 
that I know, will be some 80 feet. 
The Colonsay shingle beaches are the same as Jura’s for nature of 
the stone ; but I believe Jura’s are longer in extent, but not any 
higher above sea-level. 
(6.) The Putting-Stone of the Fingalians lies on the sea side of 
Ardskinnish. It is one of the largest boulders in Colonsay. I 
believe it is whinstone, and weighs some 4 tons at least. It is 
round in shape. Tradition says the Fingalians used to throw it 
across the bay from where it lies, to D ungallon on the opposite 
side. 
The boulders that I am mostly acquainted with, are on hills sloping 
towards the south. 
Boulders are lying on Colonsay’s highest hills. I don’t know how 
high above sea-level they are. 
The foregoing notes, though supplied by gentlemen, neither of 
whom has geological knowledge or experience, appear to me ex- 
ceedingly valuable. They show that on Colonsay there are boulders 
well deserving of study, in order to ascertain from what quarter 
they have come. From the fact stated by Mr Stevenson, that 
many boulders lie on hill sides sloping towards the west, it is 
probable that the boulders came from some westerly point, — 
perhaps from the Island of Mull. But by an examination of the 
manner in which the boulders have been set down or placed, by 
