GLEN ROY, IN SCOTLAND. 
57 
hills. This being the case, let us examine a 
little more closely the local phenomena con¬ 
nected with the ancient extension of glaciers 
in this region, and especially the parallel roads 
of Glen Roy. 
Among the Grampian Hills, a little to the 
northeast of Ben Nevis, lies the valley of Glen 
Roy, a winding valley trending in a northeast¬ 
erly direction, and some ten miles in length. 
Across the mouth of this valley, at right angles 
with it, runs the valley of Glen Spean, trend¬ 
ing from east to west, Glen Roy thus opening 
directly at its southern extremity into Glen 
Spean. Around the walls of the Glen Roy 
valley run three terraces, one above the other, 
at different heights, like so many roads artifi¬ 
cially cut in the sides of the valley, and indeed 
they go by the name of the “ parallel roads.” 
These three terraces, though in a less perfect 
state of preservation, are repeated for a short 
distance at exactly the same levels on the 
southern wall of the valley of Glen Spean, just 
opposite the opening of the Glen Roy valley ; 
that is, they make the whole circuit of Glen 
Roy, stop abruptly, on both sides, at its south¬ 
ern extremity, and reappear again on the op- 
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