756 
Proceedings of the Boy al Society 
of granite and mica slate, chiefly the former. For miles along the 
Ullapool Load on to Inchbcie , there are torrents of such blocks. 
At Achnaclerach , there is a gigantic mass of the same kind of 
granite as the Tulloch Boulders, 25 x 23 x 12 feet above ground, 
about seventy feet in girth, and weighing probably about seven 
hundred tons ; evidently an erratic, the kind of granite composing 
it being different from the rock on which it rests. 
Farther along the road towards Inclibae , several other boulders of 
the same kind, and not much less in size, were seen. 
At Inch bae Lodge , the ground is much covered by these boulders. 
At the confluence of the rivers 'Glascarnocli and Strathvaich near 
the schoolliouse, rock appears in situ identically the same as that of 
the Tulloch Hill boulders. The felspar of the rock has the same 
pink colour, and the mica is segregated in bands. The bed of 
Strath vauk river is entirely composed of the rock, and it appears to 
break naturally into huge cubical masses, among which the river 
rushes and foams violently. 
In proceeding further west no boulders were to be seen. "We 
seemed to have at length reached the parent rocks; for to the H. 
of Garbad , a place about a mile S.E. of Inchbae Lodge, no more 
boulders were met with. 
The boulders in this district occupy the valley, through which 
the Blcichwater Liver flows. 
The schoolliouse above mentioned (about seven hundred feet above 
sea-level) is at or near the base of a hill called Druim Buidlie , 1080 
feet above sea, which presents naked cliffs of granite rock facing 
W.KW. 
“ We examined the pass of the Bealach, situated between Big 
Wyvis and Little Wyvis, which reaches to a height of about 1250 feet, 
and runs in a direction N.W. and S.E., to see if any granite or other 
boulders were lying there ; but we found no travelled blocks. The 
Bealach itself is full of gigantic blocks of mica schist detached 
from the side of the pass.” 
“ It appeared to us, therefore, that the Tulloch Hill boulders had 
made a detour eastwards over the south shoulder of Little Wyvis , 
a hill which reaches to a height of 2497 feet. On the south side of 
the Blackwater Yalley, the hills rise to the height of 1500 feet 
above the sea.” 
