of Edinburgh, Session 1883 - 84 . 
923 
at the foot of the glen, hut at the head of Glen Glaster, Mr Jamieson 
saw that the only way of obtaining an ice barrier at this last-men- 
tioned place was to assume the existence of a glacier in Glen Treig, 
which he supposed would descend into and cross the valley, then 
rise up on the opposite side of the valley near the Kough Eurn, and 
next make a nearly right-angled wheel towards Glen Glaster, dis 
tant from Loch Treig no less than 6 miles ! 
I am afraid that I must agree with Professor Prestwick (Phil 
Trans, of Royal Society of London for 1879, p. 668) in the opinion 
he has expressed, that the “ Glen Treig glacier would be in- 
competent to the task assigned to it ” by Mr Jamieson. Professor 
Prestwick observes, that to block Glen Glaster col the “glacier 
would have to cross Glen Spean, and after that travel 2 miles with 
a rise of not less than 500 feet.” 
I agree with the Professor (page 684), that if there was a glacier 
from Glen Treig, which protruded into the valley, it would, instead 
of ascending the slopes on the opposite or east side of the valley, 
have followed the natural levels of the valley, and flowed down to- 
wards the north-west. 
Whilst Mr Jamieson’s primary object in suggesting a Glen Treig 
glacier was to find a barrier for the head of Glen Glaster, he also 
availed himself of the services of this glacier for explaining the 
origin of the kaims and boulders, which form the subject of the 
present paper. 
One fatal objection to this view, as it appears to me, is, that 
the materials composing these kaims are. not such as characterise 
moraines. They are what IVtacculloch properly calls rounded 
alluviumf formed by the action of water ; whereas the materials 
of moraines being merely the dtois of rocks, which fall on the 
surface of the glacier by meteoric agency, are totally different in 
character. 
Another objection to this view is, that the lines of kaims in 
the valley lie to the south of the march which any glacier from 
Loch Treig would take. To meet this obvious difiiculty, Mr 
Jamieson says that “ the glacier on issuing from the narrow gorge 
at the end of Loch Treig dilated immensely so that its right 
jianh might carry materials to the position occupied by the kaims and 
boulders. I think that if the glacier underwent such an immense 
