GLEN ROY, IN SCOTLAND. 
75 
smaller dimensions of the whole, any one fa¬ 
miliar with the tracks of ancient glaciers 
might easily fancy himself crossing the ancient 
moraines at the foot of the northern slope of 
the range of Mont Blanc, through which the 
Arve has cut its channel, the valley of Cha- 
mouni standing in the same relation to Mont 
Blanc as the valley of Loch Nilly does to Ben 
Calcagh. 
I have dwelt thus at length on the glaciers 
of Great Britain because they have been the 
subject of my personal investigations. But 
the Scotch Highlands and the mountains 
of Wales and Ireland are but a few of the 
many centres of glacial distribution in Europe. 
From the Scandinavian Alps glaciers descend¬ 
ed also to the shores of the Northern Ocean 
and the Baltic Sea. There is not a fiord of 
the Norway shore that does not bear upon its 
sides the tracks of the great masses of ice 
which once forced their way through it,' and 
thus found an outlet into the sea, as in Scot¬ 
land. Indeed, under the water, as far as it is 
possible to follow them through the transpar¬ 
ent medium, I have noticed in Great Britain 
and in the United States the same traces of 
