158 VKA GMKNTti OF 8UIKNCH. 



reached a col, or watershed, looking into Glen Spey, and 

 of precisely the same elevation as the highest road of 

 Glen Roy. 



Ilu then dropped down to the lowest of these roads, and 

 followed it toward the mouth of the glen. Its elevation 

 above the bottom of the valley gradually increased; not be- 

 cause the shelf rose, but because it remained level while 

 the valley sloped downward. He found this lowest road 

 doubling round the hills at the mouth of Glen Roy, and 



PARALLEL ROADS OF GLEN ROY. 

 After a Sketch by SIR THOMAS DICK-LAUDER. 



running along the sides of the mountains which flank 

 Glen Spean. He followed it eastward. The bottom of 

 the Spean Valley, like the others, gradually rose, and 

 therefore gradually approached the road on the adjacent 

 mountain-side. He came to Loch Laggan, the surface of 

 which rose almost to the level of the road, and beyond the 

 head of this lake he found, as in the other two cases, a 

 col, or watershed, at Makul, of exactly the same level as 

 the single road in Glen Spean, which, it will be remembered, 

 is a continuation of the lowest road in Glen Roy. 



