OF LOCHABER. 37 



(Plate VII. fig. 6.), may be of some use in helping the descrip- 

 tion of them. In it, the three uppermost lines represent the 

 proper horizontal shelves 2d, 3d, and 4th, whilst all the others 

 below have an inclination downwards in the direction of the 

 fall of the glen, and this inclination, increases in each succes- 

 sive shelf, in proportion to its greater proximity to the river. 

 These inclined lines of shelves can hardly be said to be on the 

 side of the hill, but have rather the appearance of a series of 

 small flats, one below another, between the hill and the river. 

 Shelf 2d and Shelf 3d, are to be traced, as well as Shelf 4th, 

 with very little interruption along the faces of the mountains 

 running down the south-east side of Glen Roy. Opposite to 

 the hill of Bohuntine, the glen makes a great bend to the 

 south, and afterwards returns to its south-east direction. It is 

 near to this point that the mountains on the south-east side of 

 the valley, though they still keep their roots so advanced as to 

 leave the glen perfectly narrow in the bottom, yet retreat 

 backwards above, surrounding and embracing a high and very 

 extensive semicircular plane, apparently covered with a peat- 

 moss ; but soon afterwards they again advance in some degree, 

 and at last finally terminate in the rocky prominent hill of 

 Craig-dhu, which forms the more elevated part of the division 

 between the mouths of Glen Roy and Glen Spean. Shelf 2d 

 and Shelf 3d, being both of elevation superior to that of the 

 bottom of the high plane, naturally bend away from Glen Roy, 

 in a manner somewhat similar to that in which they run into 

 the Gap of Glen Collarig, and winding around the amphi- 

 theatre of hills, and returning with them again, all traces of 

 Shelf 2d are suddenly lost, nearly opposite to the point where 

 it begins on the south-east side of the hill of Bohuntine. 

 Shelf 3d runs on a little farther, to the rocky angle of Craig- 

 dhu, where it likewise is abruptly terminated, also opposite to 



the 



