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Proceedings of the Royal Society 
1650 feet, there are eight other boulders, averaging 11x5x4 feet, 
and forming a line across the valley. 
4. The pass at the head of Loch Lyon is crowded with till, which 
fills great stretches of the valley. It has been by some means 
shaped or worn into conical mounds, and abounds from the level of 
the lake, at 1100 feet above the sea, down to about 800 feet. 
2. Excursion from Killin to Bowachter, in Glen Dochart {Perth- 
shire), and thence over Sgiath Chrom, 2780 feet ; Sgiath Gliuil, 
3050 feet ; Meall Chuirn, 3057 feet ; and along the ridge over 
Meall na Saone, 2835 feet, eastward to Mid Hill, 1977 feet; 
accompanied by Professor Bidler and Mr Colin Phillip. 
1. On the south side of Sgiath Chrom, at altitude of 1520 feet, 
found two boulders ; one in size about a cubic yard, the other 
8x5x4 feet. This last was of hornhlendic gneiss with chlorite, 
similar to a rock seen by me on a previous occasion, between Ben 
Laoigh and Ben Oss, situated about 10 miles to W.S.W. 
2. On the east side of Meall Chuirn, found a valley or trench 
running and E., about 750 feet deep, separating that hill from 
the ridge to the east. On the east slope of this trench, found some 
loose rock, apparently not fallen from the upper part or side of the 
valley, hut ice-carried. 
3. Proceeding towards the eastward, found three small hills with 
flattened summits, each over the 2750 contour line, hut not named 
on the Ordnance map. The most northern of these is very precipitous 
on its sides, and separated from the other two by narrow cols about 
80 feet deep. From the top of one of these, which we ascended, 
we descried a boulder perched on the top of another hill with preci- 
pitous sides, lying in a slight depression. The boulder was appar- 
ently about 10 feet cube. Considering this boulder, on account of 
its position, to be one of interest, we retraced our steps about 300 
yards, to try and reach the boulder, hut were defeated. There was 
over a foot of newly-fallen snow, which prevented our finding a 
firm footing, and caused constant and dangerous slipping. 
4. Proceeding about three miles farther eastward, towards the 
Mid Hill, 1977 feet, we had to cross a depressed flat surface, now a 
peat bog, about 200 feet below the top of the hill. The summit 
