of Edinburgh, Session 1880 - 81 . 
283 
(2.) In his paper “ On the Drift and Eolled Gravel of the North 
of Scotland ” (“ Quart. Journ.” for 1860, p. 365), Mr Jamieson, refer- 
ring to “ a great ridge of mica-slate stretching in an east and west 
direction, between Loch Tuinmel and the valley of the Tay,” says, 
that “all along the northern slope of this ridge, from Meal Uaine 
at one extremity, westward for 10 miles to Hioch Yore at the other, 
I remarked many boulders of granite and porphyry, at heights 
exceeding 2000 feet, the highest being one of granite, at an eleva- 
tion of 2390 feet. 
“Now I examined the greater part of that ridge, crossed it at 
several points, and walked along its crest for miles, but saw no 
indication anywhere of this granite or porphyry in situ. I think, 
therefore, they must have been carried to their present position 
from a considerable distance, and, knowing that such rocks occur 
in the high mountains situated to the northward (as, for instance, 
Glen Tilt), it is probable, that there lies the source from whence 
they have come. 
“It is not at 2000 or even 2400 feet, that we cease to find such 
transported fragments. In the Braemar district I met with them 
much higher. 
“A remarkable instance of this occurred on the hill of Morven, a 
few miles to the north of the village of Ballater. The average of 
four measurements makes the height of it 2953 feet above the 
sea, the highest value being 3048. It stands many miles apart 
from any hill of like elevation ; in fact, there is none so high within 
10 miles, and it greatly surpasses any eminence to the north and 
east between it and the sea. All the upper part of the mountain, 
so far as I could ascertain, is composed of one sort of rock, which 
seems to be a mixture of greenish hornblende and white felspar. 
No gneiss, quartz-rock, or granite came under my notice, although 
the last-mentioned rock occurs about its base. The late Professor 
Magillivray had, I find, examined the hill, and pronounced it to be 
hornblende rock. It was therefore with no small degree of wonder 
that I remarked several rounded boulders of granite, together with 
some of quartzose gneiss, or laminated quartz, lying here and there 
on the western brow of the mountain, and I traced them up to the 
very summit — one or two, indeed, are built into the cairn that 
