206 
Proceedings of the Royal Soeicty 
gneiss. “ Did that stone roll down that slope and stick there ? ” I 
asked the shepherd who walked with us. The instantaneousness 
and energy of his “ Never ! ” was delightful. “ And why not '? ” I 
asked. “Well, in the first place, not a peehle can stop on sic a 
slope, let alane sic a stane as yon, if she ance fetched wey ; in the 
second place, there are nae stanes ava on the tap, hut jist a peat 
bog ; and in the third, there’s no a stane just exactly of this natur’ 
in the hill.” We found, on surmounting the first heave of the 
hill, 2250 feet, a wide expanse of bog. 
6. Aherfoil. 
Ascended two small hills. The first {Arndriim) is a portion of the 
ridge of conglomerate rack which, in the east, occurs at Callander, 
and in the west crosses Loch Lomond, forming a line of islands. 
The ridge thus stretches E.N.E. and W.S.W. 
On this hill I found, at the height of 230 feet, a line of six 
boulders of angular fragmentary gneiss (greywacke), stretching from 
N. to S. They were closely adjacent, viz., from 2 to 20 feet apart, 
and from f to 3 cubic yards in size. 
To the west of this line, four other similar boulders lay along the 
summit of the ridge, and thus at right angles to the first line. They 
stretched nearly to the top of the hill, viz., to 454 feet. 
III.— NOTES BY MB MURRAY, GLASGOW. 
Islands of Colonsay and Oronsay. 
Mr Murray of No. 169 West George Street, Glasgow, having 
during the last two summers spent some weeks in the island of 
Oronsay, was so obliging, at the request of the Convener, as to 
search for boulders on these islands, and has sent to the Convener 
notes, from which the following are extracts : — 
1. Oronsay. 
Along the sea-beaches the shingle is found to contain pebbles 
and blocks of syenite, grey granite, and greenstone. 
The syenite may probably have been derived from rocks at Kil- 
loran Bay, in Colonsay, about 9 miles distant to the N.N.W. ; and 
