84 ON THE PARALLEL ROADS 



inclined plane, which, ultimately loses itself in the flattish moss 

 near Loch Spey. This moss appears to be very deep ; it there- 

 fore seems to me to be probable, thatalthough its gradual increase 

 has raised the surface in this place somewhat above the level of 

 Shelf 2d, yet if a body of water were raised by any means to the 

 level of that shelf, and the stratum of moss were at the same time 

 to be removed, a stream would naturally flow from it towards 

 Garvamore, in the present course of the river Spey. The ap- 

 pearances of Shelf 2d, in its return down the south-east side of 

 Upper, towards Lower Glen Roy, are very similar to what I 

 have described as existing on the north-west side : it returns 

 into the lower glen through the ravine on the south side of the 

 isolated rock. 



Let us now proceed to consider Glen Turret. When enter- 

 ed from Glen Roy, its mouth is discovered to have in the bot- 

 tom that large semicircular inclined plane, which has been al- 

 ready described as an extension of Shelf 4th. The stream of 

 the Turret, in its way to join the Roy, cuts through this vast 

 bed of sand and polished gravel to a great depth. At the cot- 

 tages of Glen Turret, (the site of which has been already sta- 

 ted to be nearly on a level with Shelf 4th), two little streams 

 unite to form the Turret. One of these branches comes gent- 

 ly from the north, through the low bottom of the glen itself, 

 which here rises very gradually in its level ; the hills a little 

 way above, expanding into a considerable circle, around the 

 termination of the glen. The other branch pours precipitate- 

 ly into the lower glen, where the houses stand, from a much 

 more elevated valley to the north-west, marked High Glen in 

 the map. Proceeding to trace this stream upwards from the 

 houses, it is found to exhibit a continued series of cascades, 

 particularly at the top of this the precipitous part of its course, 

 where it leaves the more level bottom of the High Glen, by 



falling 



