D. MILNE HOME ON THE PARALLEL ROADS OF LOCHABER. 639 
At another spot near the mouth of this Corry, outside of it, I found a 
rock with two sets of striz. One set were in the same direction, N.N.W., the 
others were running E. and W. 
These observations, as regards the markings on the rocks, seem to be irre- 
concilable with any glacier theories which have yet been proposed. A sea 
current flowing from a north-westerly direction, but with local variations caused 
by the direction of the hills, seems to me a more likely solution. 
As still bearing on the question, there is another set of facts which deserve 
notice. I allude to the position of some of the boulders. 
(1.) The height at which many are found is interesting. 
I extract the following from my notes.—“ On the summit of the hills at the 
head of Glen Roy, about 169 feet above the highest shelf (¢.¢., 1320 feet above 
the sea), there are enormous (granite) boulders. Some rest on surfaces of bare 
rock; but traces of clay and gravel about them suggest that they may originally 
have been imbedded in drift, which has been since mostly washed away from 
under and about them.” 
Mr Darwin was much struck by the number, size, and composition of some 
of the boulders he saw between Glens Gluoy and Roy. One of the spots where 
he found several granite boulders was what he calls a “ hillock” of gneiss, 2200 
feet above the sea. The hillock was separated from all other hills, so that the — 
boulders could not have rolled down from them. He refers also to the swmimit 
of a very sharp peak of gneiss (1600 to 1700 feet above the sea), on which he 
found a block of syenite with pink felspar. This peak is wholly separated from 
other hills. He did not see anywhere another boulder of this syenite, or any 
rock in situ resembling it. (“ Phil. Trans.”, Vol. 129, p. 69.) 
On the Wester Beinin Hill, situated close to Loch Laggan, I found a grey 
granite boulder about 4 feet in diameter, resting on a flat shelf, about 1516 feet 
above the sea. The rocks of the hill here, are a coarse red granite. The 
side of the hill on which the boulder lies points W.S.W. 
Mr JAMIESON mentions several large boulders on or near the top of Craig 
Dhu, which is 2100 feet high. Iwas also at the top of Craig Dhu, and saw 
the boulders which Mr JAmreson examined. This hill is of gneiss rock, whilst 
many of the boulders are “ of syenitic granite.” 
Mr JAMIESON adds :— 
*« What is remarkable is, that the largest and most angular are more numerous, high wp on 
the very brow of the hill, than they are farther down. Thus one 12 x 9 x 6 feet lay only 130 
feet below the hill summit; another was a magnificent block 15 x 10 x 6 feet.” 
Mr JAmiESON also found granite boulders on the top ef Bohuntine, a hill 
2000 feet high, situated between Glen Roy and Glen Collarig. 
Mr JOLLy states (MSS., p. 10) that on the west side of Craig Dhu, he found 
VOL. XXVII. PART IV. 8 F 
