162 Proceedings of the Boyal Society 
twenty to thirty boulders, on the east side only one or two. The 
greatest number consisted of grey granite — of which rock, however, 
as Matheson assured the Convener, there was none in Glencoe ; the 
nearest being, as he said, on the shore at Ballachuhsh Hotel, at the 
mouth of the Glen, and farther westward towards Duror. 
Matheson then conducted the Convener down the valley on 
the north side to some larger boulders. Several were pointed out 
from 10 to 12 feet long, at heights of 1200 to 1400 feet above 
the sea. These also were of grey granite, their longer axis being 
about east and west, or parallel with the direction of the glen, at 
this place, and about 400 feet above the bottom of the glen. 
About 50 feet above these grey granite boulders, smoothed rocks 
were observed. There were no striae ; but the smoothing seemed 
due to a frictional agent which had come down the glen. 
On the same (north) side of the valley, the Convener had pointed 
out to him by Matheson, at one or two places, about 1183 feet above 
the sea, a mass of conglomerate rock in situ, similar, as he said, to 
the “ Dog-stone ” at Oban. The Convener observed that two frag- 
ments had been detached from the rock, and been formed into 
boulders. One was on the slope of the hill, about 50 yards west of the 
parent rock, and 30 feet below it in level; the other of these boulders, 
and larger in size, was resting on the schist rock of the hill, about 
200 yards west of the parent rock, and about 45 feet below it in 
level. These observations indicated that some agent had here been 
moving down the glen, and had both broken off and transported 
portions of the conglomerate rock. 
On the other hand, there is a cliff of this conglomerate rock which 
holds in a cleft of it a grey granite boulder, and in a position which 
show r s that it had come ujp the glen from the west. Tig. 36 A 
represents this boulder leaning on the hill rock, the view being 
taken from the south, about 500 yards distant. Tig. 36 B repre- 
sents the same boulder, viewed from the north, at a distance of 
about 10 yards. 
Matheson next informed the Convener that if the latter wished 
to see the biggest boulder in Glencoe, he would have to cross to 
the opposite side, at a place about a mile further down, and at a 
considerable height above the river channel. 
The Convener went to the place and found the boulder in 
