734 Proceedings of the Royal Society 
St Vigeans. — Gneiss boulder, now destroyed. Supposed to have 
come from mountains situated to N.W. If so, it had to cross 
valleys and ridges of hills. Kaims in parish full of granite 
and gneiss boulders. (Reporter — Rev.William Duke, minister.) 
Hebrides. 
Barvas. — On Estate of Sir James Mafcheson, a monolith, called 
Clack an Trendack, or “ Gathering Stone.” Height above 
ground, 18 feet 9 inches, and girth 16 feet. (Eeporter — 
Eev. James Strachan.) 
Harris. — A large boulder on a tidal island, broken into two frag- 
ments, 100 feet apart. (Eeporter — Alex. Carmichael.) 
North Uist. — On a small island called Caneum, north of Locli- 
maddy Bay, there are two boulders of Laurentian gneiss, 
which, though 100 feet apart, are evidently the two fragments 
of one block. The rocks in situ are also gneiss ; but there is 
no hill or cliff near, from which the block could have fallen or 
come. One boulder weighs about 15, the other about 50 tons. 
They are both on the sea-beach, with a ridge or isthmus of 
rock between them. The boulders have each a side — in the 
one concave, and in the other convex — which face one another, 
and correspond exactly in shape and size. The edges of these 
two sides (viz., the convex and concave) are sharp, whereas 
the other sides in both boulders are rounded, suggesting that 
the original block had undergone much weathering or other 
wearing action before being fractured. The larger boulder 
rests fantastically and insecurely on two smaller blocks. 
Eeporter thinks the boulder brought by ice, and that it fell 
from a height, and was split by the fall. 
In Long Island the hills even to the summits are covered 
with blocks and boulders. As a rule the edges of these are 
sharp, whereas the native rock, whether low down or high up, 
is glaciated, grooved, and striated to a very remarkable degree. 
The best places to see these marks are where drift, covering 
them, has been recently removed. They are obliterated in the 
rocks, which have been much weathered. (Eeporter — Alex. 
Carmichael, Esq., South Uist, by Lochmaddy.) 
The Lewis. — (Q. S. Parish of Bernera. On farm of Ehisgarry, be 
