692 
Proceedings of the Royal Society 
4 in width, and 2 feet high. It is round in shape, and about 400 
feet above the sea. 
Several valleys and ridges of hills lie between Chillingham and 
the Big Cheviot, across which the boulder must have been trans- 
ported to reach its present site. 
Remarks by David Milne Home, LL.D., Convener of the 
Society’s Boulder Committee, on presenting the Commit- 
tee’s Fourth Beport at a Meeting of the Society, 20th 
May 1878. 
1. In presenting a Fourth Report from the Society’s Committee on 
Boulders, I may he allowed, first, to refer to the main object for 
which the Committee was appointed. 
It was to collect data which might help towards a solution of the 
problem, by what agency boulders in Scotland had been transported 
from the parent rocks to the positions they now occupy. 
The Transactions of the Society contain numerous papers by 
eminent geologists on this question. 
At a very early period, Sir James Hall, when he drew atten- 
tion to many large boulders, and also to the remarkable appear- 
ances called “crag and tail ” in the midland districts of Scotland, 
ascribed both sets of phenomena to the agency of great bodies of 
water, which had passed over the country from west to east. 
At a later period (about the year 1842), Agassiz and Dr 
Buckland started the idea, that as in Switzerland, glaciers had 
been the means of carrying masses of rock from the Alps across the 
valley of Geneva to the Jura mountains, so there might in former 
days have been glaciers in Scotland producing similar effects. 
More recently a third theory was started, — that if the sea stood 
several hundred feet above its present level, floating ice might have 
been the means of transporting the boulders, and carrying them 
great distances. 
2. There being thus three different theories of transport, each 
supported by eminent geologists, the Committee has endeavoured to 
gather facts to ascertain which theory is the most probable, or 
whether any better can be suggested. 
I do not presume to say that the information contained in this and 
