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Proceedings of the Royal Society 
boulders on and near the top had come from a S.S.E. direction 
{Eighth Report, p. 37). 
As other geologists have visited this hill, and recorded views 
which contain further information, it is right to refer to them. 
Thus Mr Jamieson of Ellon mentions having seen several large 
boulders of syenitic granite on or near the top of Qraig Dhu, a gneiss 
hill, at a height of 2100 feet above sea. He says— “ What is 
remarkable is, that the largest and most angular are more numerous 
high up on the very brow of the hill than further down. Thus” 
(he says), “ one 12x9x6 feet lay only 130 feet below the summit j 
another was a magnificent block, 15x10x6 feet” {L. G. S. J., 
vol. xvii. p. 175). 
The late Professor Mcol of Aberdeen, well known as a geolo- 
gist, refers to the Craig Dim boulders in these terms : — 
“ I found huge blocks of black granite and smaller masses of red 
porphyry within a few yards of the summit of Craig Dhu, a conical 
mountain of mica slate. One block must weigh 40 tons. They 
are evidently ice-borne, probably floated from the H.W.” {Lond. 
GeoL Soc. Proc., August 1869, p. 283). 
The Convener visited Craig Dhu, and noted the following 
points : — (1) The boulders on the hill, in so far as not of a round 
shape, have their longer axis E. and W. A little above 1391 feet 
level, found boulder on bare rock, which here forms a flat surface, 
glaciated like the rest from W. by The boulder must have come 
after glaciation of rocks. Looking towards west, saw a line in that 
direction clearing all the hills, showing an opening for a move- 
ment from west towards and upon Craig Dhu. Masses of white 
quartz rock were found glaciated from west. A boulder near top 
of the hill, with longer axis W. by S. {Edin. Roy. Soc. Trans., 
vol. xxvii. p. 641). 
Mr Jamieson refers to a granite boulder on the top of Boliun- 
tine, a hill 2000 feet high, not far from Craig Dhu {Eighth Report, 
p. 639.) 
Mr Jamieson, in describing smoothings and scorings of the 
rocks at Loch Treig, up to 1280 feet, states that he found 
perchedj houlders'' and rounded surfaces of rock much higher, 
and even up to the top (about 3155 feet above the sea). The 
gneiss, though it runs in nearly vertical stratifications, is neverthe- 
