194 GEOGNOSTICAL SKETCH OF THE 
forms the whole of this ridge, constitutes also the whole of 
the peninsula called the Black Isle, lying between the Friths 
of Cromarty and Beauly, as also the land for a few miles 
round all the shores of this latter Frith. On the Inverness- 
shire side of Kessock Ferry, the remainder of the chain, 
to Dochfour, consisting of three or four hills, is formed of 
the same sandstone, and its associated conglomerate. The 
most conspicuous hill in this part is the beautiful and well- 
known Craig Phadric, on whose summit is situate the well- 
known vitrified fort. It gradually rises from the village of 
Clachnaharry, situate at the entrance of the Canal, to the 
height of 500 feet, and terminates in a tabular, or rather 
elhptical, summit, whose length is 220 feet, and breadth 
100 feet. Towards Kessock, it subsides into two lower and 
mural tops ; but its acclivities, towards Inverness and the 
Beauly Frith, are sloping, and highly cultivated. The 
highest top is surrounded by a wall of vitrified earth and 
stones. Where the masses are but partially vitrified *, we 
can discern them to be composed of the sandstone and con- 
glomerate, which form the great body of the hill, as well 
as of boulders of granite, gneiss, felspar, and quartz rock» 
To the west of Craig Phadric, the country, for many 
miles along the Beauly Frith, is composed of the same red 
sandstone. At the extremity of the Frith, however, its 
progress is stopped, by the approach of the granite and 
gneiss mountains of Ross-shire ; and, in the Aird, the dis- 
trict lying along the south side of this sea, its uniformity 
is interrupted by the appearance of granite-hills at a place 
called Phopachy. These we shall afterwards shew to be 
the termination of the Second Range, namely, that running 
from Dochfour to Fort Augustus. This last range conse- 
* The vitrified surface does not exceed six or eight inches in diameter. 
