OP LOCHABER. 33 



of that tributary valley ; but as I mean to allot a particular and 

 distinct description to that glen, I shall take up these shelves 

 at present where they return from Glen Turret, sweeping 

 boldly and distinctly around the southern side of the moun- 

 tain of Tom-Bhran. The side of that hill which flanks Glen 

 Hoy, being very rocky, they are to be traced, but faintly, 

 along its face, until they come opposite to the isolated crag 

 that forms the boundary of division between Lower and Up- 

 per Glen Roy. Here these two shelves, which have hitherto 

 kept company with one another, are now separated. Shelf 3d 

 being of a level considerably below that of the crag, or rather 

 below that of the upper parts of the bottoms of the ravines on 

 each side of it, and being thus prevented from passing 

 through them, and continuing onwards, at the same level 

 it has hitherto preserved, winds very indistinctly amongst 

 the hollows of the rocks, and along the rugged face of the 

 isolated boundary, and is then to be traced returning along 

 the south-western hills of Glen Roy, gaining a more mark- 

 ed appearance as it proceeds down that side of the valley. 

 But Shelf 2d, running on an elevation superior to that of 

 any part of the bottoms of the ravines, is of course not ob- 

 structed by them, but continues to run up through them into 

 Upper Glen Roy, whilst, at the same time, vestiges of it are 

 traced about the top of the independent central rock, some 

 parts of which seem to rise above its level. An examination 

 of the map, will assist in enabling the understanding to follow 

 out the intricacies of this important part of the description. 

 Pursuing shelf 2d above the isolated crag, it is to be traced 

 along near the bottom of the mountains, on the north side 

 of Upper Glen Roy, its level extending as far as within two 

 hundred yards of Loch Spey. It, however, requires consider- 

 able attention to follow it out in this upper valley, as in most 

 places it has less the appearance of a shelf than of a widened 

 vol. ix. p. i. e inclined 



