430 
Professor Agassiz, when at Edinburgh, accompanied Mr. 
Maclaren to a quarry on the south side of Blackford Hill, 
where the rock, for the space of ten or twelve feet in length, 
is smoothed and marked by stria or scratches ; on seeing 
which, Agassiz instantly exclaimed, That is the work of 
the ice." It is, therefore, not only from general reasoning 
that glaciers had probably existed in these kingdoms^ but 
from the actual observation of phenomena apparently caused 
by glaciers, that Agassiz, Buckland, and other geologists, 
have arrived at the conclusion that they formerly existed 
here. Dr. Buckland, in the course of his investigations, has 
extensively examined several districts in Great Britain, having 
previously, in 1838, surveyed the phenomena presented on the 
south-east slopes of the Jura, and by actual glaciers in the 
Alps. On an attentive comparison of these with what he 
remembered to have observed in 1811, near Dunkeld, and in 
1824, near Ben Nevis, he was convinced that they were of 
similar origin : and Mr. Calverley Trevelyan, of Wallington, 
in Northumberland, a zealous and accurate observer, who had 
examined the supposed evidence of glaciers in the highlands, 
has lately written to Dr. Buckland, expressing his conviction 
that they are precisely similar to the glacial phenomena which 
he has recently examined in Switzerland. In a paper read to 
the Geological Society, Nov. 18th, 1840, Dr. Buckland de- 
scribes a terminal moraine, near Closeburn, in Dumfriesshire, 
formed of materials derived from the adjacent Lowder Hills, 
with fragments of granite, the nearest rock in situ of which is 
thirty miles to the north-west at Loch Doon. Its height varies 
from twenty to thirty feet, its breadth at the base is about one 
hundred feet, and its length nearly a quarter of a mile. In 
Aberdeenshire, Dr. Buckland found insulated tumuli and 
ridges of gravel occupying one hundred acres, which he con- 
siders to be terminal moraines. Both in Aberdeenshire and 
Forfarshire, Dr. Buckland observed many traces of what he 
