D. MILNE HOME ON THE PARALLEL ROADS OF LOCHABER. 635 
an angle of 50° degrees towards west. Striz were on this rock, and these 
stric were horizontal. Within a few yards of the top of Craig Dhu, the edges 
of the strata running north and south were all ground down on the west sides, 
and remained rough on their east sides. 
Ben Chlinaig is opposite to Craig Dhu, being on the south side of Glen 
Spean. Mr Jozty found, on the side facing the valley, striated rocks at a 
height of 1750 feet above the sea, the striz running S8.E. and N.W., or parallel 
with the valley at this place. 
About two miles further south, in the Laire valley, at a height of 1600 feet 
above the sea, Mr Joxty found, on a rock surface, strize 50° W. of north. 
Mr JAMIESON examined the rocks at the outlet of Loch Treig, and found 
the rocks smoothed at a height of 1000 feet above the Loch, and 1740 feet 
above the sea. 
“One bare flat surface of gneiss, thirty yards long, beautifully smoothed, and covered with 
parallel scratches, scores, and flutings, running straight from end to end.” Elsewhere,—‘ Strie 
running horizontally along the faces of the rock, were traced up to 2000 feet, Not that I affirm 
even this to be their upper limit.” He mentions other appearances, even as high as 3055 feet 
above the sea, which “raise a suspicion, that some denuding agent has flowed over, it at a 
period geologically recent.”—(“ Lond. Geol. Socy. Journal,” 26th February 1862, p. 172.) 
Unfortunately Mr Jamieson does not mention the direction of the parallel 
scratches and flutings described by him. But it is not unimportant to observe 
his statement, that “along the faces of the rocks” they were “running horizon- 
tally.” 
In connection with Loch Treig, I may mention that in company with Mr 
Jouty and my brother, I walked from its mouth due east along the side of the 
hill, at a height of about 1600 feet above the sea, and at a distance of about 
a mile, we came on a large mass of rocks, projecting from the hill side. These 
rocks, presenting high vertical faces, at once arrested our attention. On their 
west sides they were rounded and smoothed, as if by some heavy body or bodies 
which had rubbed and pressed against them. On their east sides they were 
rough, as if these sides had been protected, ¢.¢. not subjected to the action of 
the rubbing agent. At the foot of these rocks there was an enormous 
accumulation of large boulders. The agent, whatever it was, which had been 
rubbing the rocks, seemed to have brought the boulders and dropped them 
there. These rocks are at a height of about 1500 feet above the level of the 
sea, as shown by the O.S. contour lines. 
The foregoing remarks apply to markings on the rocks in Spean Valley. 
But it is also proper to refer to the banks of gravel and boulders on the hill-side 
to the east of Loch Treig.* They run along the hill-side in an east and west 
direction. Near Loch Treig there are eskars, at the several heights (by 
* See Plate XLIII. 
VOL. XXVII. PART IV. SE 
