of Edinburgh , Session 1877 - 78 . 
703 
as position, attracted the notice of Professor Hicol and Mr Jamieson; 
and they are mentioned in both of my recent papers “ On the 
Parallel Roads.” (See also Committee’s First Report, p. 39.) 
In these papers I had occasion to point out how the position of 
the boulders both in Glen Roy and Glen Spean indicated that they 
had come — not down these glens, but up the glens. If the boulders 
at Loch Creran were rafted on ice from Mull by a sea current 
flowing eastward, the position of the boulders in Glen Roy and 
Glen Spean could be explained in the same way. 
(4.) There is another fact connected with the position of boulders 
in the West Highlands, and indeed over Scotland generally, which 
receives explanation from Professor Judd’s paper “ On the Ancient 
Volcanoes of the Hebrides,” I mean the high position of many large 
boulders. 
In the Committee’s Second Report notice is taken of a remark by 
the Ordnance Surveyors (p. 157), that in the Stratherrick district, 
where the highest hills are about 2900 feet above the sea, the 
boulders on the sides of these hills extend down to a level of 
about 2250 feet, bid not lower. 
In Fortingall parish (Perthshire) a gneiss boulder, weighing above 
400 tons, is lying on clay slate rocks at a height of 2500 feet, being 
very near the ridge of clay slate hills. The gneiss hills form a 
range about 20 miles to the north and north-west. (Committee’s 
First Report, p. 49.) 
On the Fannoch Mountains (Ross-shire) a gneiss boulder of about 
130 tons weight lies on a water-shed at a height of 2000 feet above 
the sea. (Committee’s First Report, p. 49.) 
On Schehallion (Perthshire) blocks of grey granite are seen at a 
height of 3000 feet. (Committee’s Second Report, p. 173.) 
On the top of a hill in Lochaber, exceeding 3000 feet above the 
sea, there are granite boulders. (Paper on Parallel Roads, Tr. of 
Soc. vol. xxvii. p. 740.) 
How where are there at present in Scotland ranges of mountains 
from which fragments could have been transported to such heights as 
those above named 'l There are now none such. Isolated peaks there 
are, but none exceeding 4300 feet ; and of these there is but one, in 
the West Highlands (Ben He vis), though it is from the westward 
that the great bulk of the boulders which overspread Scotland have 
