617 
of Edinburgh, Session 1879 - 80 . 
there is the deep gorge of the Coire Ruadh, which if it then existed 
would have conducted any glacier from that hill in a different direc- 
tion, viz., towards the U.W., and not towards Loch Creran, which 
lies almost due south from Fraochaidli. 
3. Upon the south slopes of Stob Gone Ruadh there is a boulder of 
the peculiar porcelain porphyry worked at Kentallen inAppin. The 
boulder is about a square yard in size. That it is a boulder, is evident 
from the fact of the rocks of the hill where it lies being totally 
different. Its height above the sea is 2250 feet. Uow, a porcelain 
rock of exactly the same kind occurs among the Ben a Bheithir 
hills, at exactly the same height above the sea, about midway 
between Craig Ghorm and Sgorr Dhonuill , which is 3 or 4 miles 
to the U.N.W. 
Assuming that the boulder came from that point, it must have 
crossed two valleys, each of which is less than 700 feet above the 
sea. How it could have crossed these, except on floating ice, it is 
difficult to see. 
4. There is another boulder among these hills deserving notice. It 
is one of Schistose Breccia , lying on the east side of Fraochaidli, at 
a height of 2235 feet. The rock of the hill here is a Schistose Gneiss. 
Now rocks of Schistose Breccia occur between the two peaks of Ben 
a Bheithir just mentioned, situated to the N.N.W. This boulder 
in like manner must have been carried across the deep valley of the 
Durer to have reached its present position. 
5. The col between Creran and Allt na Gaorran showed glaciation 
coming down from the corries of the rough Sgorr na Ulaidh , and out 
of a corry on Ben Fhionnlaidh. Many loose and angular blocks of 
the hills themselves, much confusion, and smashing of every kind, 
and the glaciated contours, twisting away to go down both glens 
in opposite directions, S.E. and S.W., is all that this locality 
discloses. The deep cut of Glen Ure showed evidence of movement 
down it. 
In reviewing the information obtained by me regarding these 
Creran boulders, I feel that there ought to be farther study of them, 
before their mode of transport can be said to have been discovered. 
On the one hand, the clustered manner in which the boulders lie on 
the west of Miall an Aodcdn , and at two spots on the east side of 
Glen Creran, is suggestive of blocks having rolled over the terminal 
