332 Dr. Mac Culloch on the Parallel Roads of Glen Roy. 



no place does the altitude of these hills rise to the level of this 

 lowest line ; a fact which it will be necessary to keep in mind 

 when we enquire into the causes that have led to the formation of 

 these lines. It is also necessary to remark that through this wide 

 and irregular space there are no streams of any note, but that the 

 whole is drained in an almost imperceptible manner into the only 

 river which traverses it ; the Spean. The opening of this valley 

 is wider than its mean dimension, since it gradually and imper- 

 ceptibly loses itself in the great valley of the Lochy, which forming 

 a wide plain, at length terminates in the sea at Loch Eil.* 



Before examining the distant connections of Glen Roy it is 

 necessary to return to its more immediate ones ; as in them alone 

 the traces of the lines are marked. Having already mentioned all 

 that was required relating to Glen Fintec and Glen Spean, it only 

 remains to describe Glen Turit, which I deferred lest it should in- 

 terrupt the more important account of Glen Roy itself. 



I mentioned that towards the upper part of Glen Roy two glens 

 entered by wide openings, bringing in two tributary streams to the 

 Roy. One of these, of inconsiderable extent, has already been 

 sufficiently described. The other, Glen Turit, forms a commu- 

 nication between Glen Roy and Glen Gloy, rising between the two 

 and discharging its waters on both sides. Where it falls into Glen 

 Roy it is at so high a level as to exclude the lowermost of the lines. 

 Traces however of the two upper ones enter its mouth, on the 

 right hand side of which (looking from the source of the water) 

 they speedily and suddenly disappear. But on the left, besides a 

 short trace of the second, a line is to be seen extending for the 

 space of a mile or more on a level with the uppermost in Glen 

 Roy, until it is cut off by the rising of the bottom of the glen. 



* See Plates 19, 20, 



