68 
THE PARALLEL ROADS OF 
walls of the valleys. There are other terraces 
in neighboring valleys at still different levels, 
— in Glen Gloy, for instance, where the one 
horizontal road was no doubt formed in conse¬ 
quence of the damming of the valley by a glacier 
from Loch Arkeig. Mr. Darwin has seen 
another in Glen Kinfillen, which I would ex¬ 
plain by the presence of a glacier in the Great 
Glen, the marks of which are particularly dis¬ 
tinct about the eastern end of Glen Garry. 
The evidence of the ancient presence of 
glaciers is no less striking in other parts of 
the Scotch Highlands. Between the south¬ 
eastern range of the Grampian Hills, in For¬ 
farshire and Perthshire, and the opposite ridge 
of Sidlaw Hills, stretches the broad valley of 
Strathmore. At the time when Glen Spean 
received the masses of ice from the slopes of 
the western Grampian range, the glaciers de¬ 
scended from the valleys on the southern slope 
of the southeastern range and from those on 
the northern slope of Sidlaw Hills into the 
capacious bed of the valley which divides them. 
The glacial phenomena of this region present a 
striking resemblance in their general relations 
to those of the Alps and the Jura. The Gram- 
