278 
Proceedings of the Royal Society 
Some hesitation may be felt in assuming that the boulder on 
Schehallion, being only 18 feet below the highest summit of 
Albannach, could have come from Albannach ; but it is quite 
possible that Albannach Hill may, since the boulder epoch, have 
been lowered by denudation. 
A sketch of the Rannoch district is given on Plate IV., with red 
dots to show the positions of the boulders seen and identified by 
Professor Heddle. 
Professor Heddle adds, that having heard that other observers 
had found boulders on Schehallion, and which were supposed to 
have come from the Ben Aulder district, he thinks it right to 
mention that there is in fact no granite in the hills of that district, 
except at one locality, where Prince Charles’s Cave is situated, at 
which place the granite is composed of crystals an inch or more in 
size, by which it is quite distinguishable from the boulder he found 
on Schehallion, and from the Albannach granite. 
2. Another district examined last year by Professor Heddle, was 
both banks of the Linnhe Loch to the S.W. of Fort William. 
It will be seen from last year’s Report, that at two places, there 
were appearances for which he could not account, except on the 
supposition that some agent had brought boulders across the Linnhe 
Loch, from the district of Glen Tarbert, to the districts at the head 
of Glen Crerar and Glen Etive. 
In order to seek for symptoms of glaciation in the Glen Tarbert 
district, Professor Heddle last year crossed by the Connal Ferry. 
That glen, and several hills and valleys adjoining it, were ex- 
amined with little success. Boulder clay only was found, viz., in 
Glen Tarbert itself. 
At length a valley called Coir Syveamhael, running in a jST.W. 
and S.E. direction, was found “ tremendously glaciated” between 
the altitudes of 950 feet and 1550 feet. 
Marks of glaciation were also strong between Meall Cliallium and 
Meal-a-Chairean Zuachraid. These marks showed movements not 
only over the col (1680 feet) but for a certain distance up the north 
slopes of Meal Challium, the rocks of which had been powerfully 
acted on. The course of the ice, judging from the smoothings of 
these rocks, seemed to have been from W.N.W. 
The glaciation extends down into the valley called Coire Mecdl 
