820 
Proceedings of the Royal Society 
When viewed from top of Barvas Hills they form a striking 
feature, as the bright green of the grass covering them con- 
trasts with the dark brown or black colour of the widespread muirs 
which they traverse. 
These escars reach to a height of from 30 to 50 feet above the 
adjoining flat ground. At one place (about 2 miles north of Barvas 
Hills) an escar expands and divides into a series of knolls, on 
which many boulders now rest. The highest knolls have on them 
the greatest number of boulders. At two places the boulders form 
groups, piled on one another. They had formed (as was mentioned 
by a shepherd) hiding places in times of trouble. Most of the boulders 
on these escars show transport from IS.W., but some indicate a 
transport from WhS.W. ; one from N.N.E. 
In this part of the island there are numerous lakelets, whose 
longer axis is generally parallel with the lines of escar, — a fact all the 
more remarkable, as the outcrops of the gneiss rocks generally 
form lines in the direction of N.E. and S.W. and dipping S.E. 
Dr Geikie was much struck with this fact, and expressed an 
opinion that the formation of the escars and of these lakelets must 
be due to one and the same agency, viz., a glacier or ice-sheet, 
which came across the “ Minch ” from Eoss-shire. 
(10) Along coast from Barvas^ eastward, boulders of granite, 
differing from any rocks near them, and alleged by a local mason 
seen by Convener to be same as rocks 7 or 8 miles to westward. 
A great monolith here, 18 feet 9 inches high and with a girth of 
16 feet, called “ Clachan Treudach^^ or “ Gathering StoneJ^ 
(11) Dalheag Hills, about 9 miles west of Barvas. Smoothed rocks 
and boulders indicating movement from westward. 
(12) At Tolsta (12 miles IST.E. of Stornoway) a boulder 18x5x4 
feet, and 358 feet above sea, called the “Eocking Stone.” Eocked 
when Convener lifted it, or when he rested his weight on it, at 
either end of its longer axis. Its central part rests on bare smooth 
gneiss rock. Its longer axis points hf.N.W. It is well surrounded 
by high hills but towards N. W. there is an opening in the range of 
hills through which boulder might have come [Fifth Report, p. 31). 
(13) Eye Peninsula to east of Stornoway, where rocks are Old Eed 
Sandstone. Boulders of gneiss occur there, which almost certainly 
must have come from Barvas Hills, situated about 7 miles to IST.W. 
