412 On the ROCKS in the 
. 
SALISBURY CRAIG is fituated on the north fide of Arthur’s 
Seat, againft which its fouthern extremity refts: from this it 
extends, in a northern direction, and rounds towards the 
eaft, fo as to form the fegment of a circle, about half a 
mile in length It is furmounted by a magnificent fagade, 
which .is loweft at the extreme points; towards the mid- 
dle, the perpendicular rock may be from 80 to go feet high. 
From the bafe of this precipice, a floping bank, covered 
with debris, reaches to the valley below, altogether form- 
ing an elevation of nearly 4oo feet. From the upper edge 
of it, a regularly inclined plane, flopes gently, on the oppofite 
fide, at an angle of about 15°, in a north-eaft direction, and 
forms the left bank of the valley, called the Hunters Bog. On 
the right of this valley, the rocks again rife rapidly, affording 
indications of two or three feparate facades. Thefe are not 
characterized in the diftin@ manner of Salifbury Craig, but are 
furmounted by a furface, which, though a little rounded, pre- 
fents an inclination correfponding with that of the Craig, in 
a very ftriking manner. 
From the bafe of Salifbury Craig, or rather from the bafe of 
the debris by which it is encircled, towards the fouthern ex- 
tremity, the ground again rifes, and prefents an inclined plane, 
fimilar to its own, but of lefs magnitude. This is known by 
the name of St Leonard’s Hill. 
Hence it appears, that there are three fimilarly inclined 
planes or terraces, of which Salifbury Craig forms the interme- 
diate one, each of them having a different elevation. From this 
ftructure we may eafily conceive the origin of the Swedifh 
word Trap, which has been employed as a generic term, for 
the 
