Mr. Macgillivray’s Account of the Outer Hebrides. 407 
the east coast to the farm of Shelibost. It is about thirty feet 
thick, rises in many places several feet above the surface, and pre- 
sents at a distance the appearance of an enormous wall in ruins. 
The Island of Tarnsay, on the west coast, is remarkable for a 
great deposit of granite, the felspar of which is remarkably beauti- 
ful, of a deep flesh-colour, and may be obtained in masses of seve- 
ral feet in diameter. The mica also exists in very large plates, 
and is of a silvery hue. 
At Tarbert the sea nearly meets, leaving only a neck of land 
about a fourth of a mile across, which connects the southern with 
the northern part of Harris. This latter consists of a rugged, lofty, 
and picturesque range of mountains, running nearly across the ge- 
neral direction of the range of islands. It is divided into several 
masses by transverse valleys or defiles. The most remarkable of 
these masses, Clisheim, is beyend doubt the highest land in the 
Outer Hebrides, and its summit is probably upwards of 3000 feet 
above the sea. This mountain range differs essentially from all 
other parts of the Outer Hebrides in the circumstance of its pre- 
senting enormous precipices, rugged glens and corries, serrated 
peaks and sharp ridges. Yet it does not differ in geological consti-« 
tution, consisting of gneiss of the ordinary varieties, together with 
beds of hornblende-slate and black scaly mica, intersected by veins 
of granite and trap. A mass of the latter occupies the lower part 
of the bay of Marig, and forms the small island of that name. It 
consists of a granular substance apparently composed entirely of mi- 
nute particles of bronzite, containing larger portions of the same 
substance. 
The Island of Scalpay terminates this range on the east, and the 
Island of Scarp on the west. The latter is a mountain, separated 
from the others by a narrow channel. ‘The former is low, and pre- 
sents nothing of great interest, excepting a bed of potstone and 
serpentine, mixed with hornblende, talc, and other substances, 
_ which has attracted notice on account of its being in the vicinity 
of the lighthouse erected on that island. 
From the forest of Harris a range of low hills runs parallel to 
the northern portion of Loch Seaforth, to the length of eight or 
ten miles, and terminates in low swampy ground. 
Separated by Loch Seaforth from the Harris mountains is a re- 
markable and very compact group called the Park Mcuntains, oc- 
cupying the space from Loch Seaforth to Loch Linerbost. Some 
of these mountains appear to be nearly 3000 feet high, and along 
the eastern coast, and especially at the entrance of Loch Seaforth, 
present precipices, shelves, and steep declivities of great magni- 
ficence. 
On the western side of the island, extending between Loch 
Resort and Loch Rog, is another group of rugged and barren 
mountains, of which the most conspicuous, Miatashal and Suaineval, 
cannot be lower than 3000 feet. All these mountain groups are 
similar in geological composition. 
