THE MOORLAND PLYM. 
301 
A little higher on the hill than this last, is a very fine hut- 
circle, forty feet in diameter, and built apparently partially on an 
artificial mound, raised to bring the floor level. 
There are many hut-circles, and one or two enclosures of the 
ordinary type, in addition to those already described ; and a little 
to the south of the old smithy is a wall apparently erected for 
purposes of fortification. (See figure A.) 
On one side, the northern, this wall is practically level with 
the ground, but on the southern it rises with a perpendicular face 
from an artificial dyke, and, curiously enough, this face is not 
toward the side from which attack might be expected ; on the 
contrary it is toward the huts and enclosures it seems designed to 
protect. There is a fortified entrance through this wall, and this 
being on the high side, also points to the somewhat unusual 
arrangement of an agger preceding the vallum. This wall runs 
east and west. Near Trowlesworthy house itself, in addition to 
many old field enclosures now fallen to ruin, there are the 
remains of two circular pounds, the one of seventy-four yards in 
diameter, and with two hut-circles in the centre, and the ad- 
joining one somewhat smaller, with only one hut-circle of about 
twenty-four feet diameter in the centre. These may possibly 
represent the old Troule's Weorthig. On the other bank of the 
river, beside the large mounds left by the tin streamers, there are 
no objects of special interest. 
BLACKABROOK TO LANGCOMBE. 
From the junction of the Blackabrook upward, the valley of 
the Plym assumes a bolder character, and for the next mile or so 
of its course it runs between high banks, and over a bed thickly 
strewn with boulders. 
A little below the Wallabrook the banks recede on either 
side, the valley widens, and the river, though still having a 
rapid fall, comes down through a narrow plain, and over an 
even bed. 
At Ditsworthy House the valley narrows again, only to expand 
once more immediately above the weir pool, and here the southern 
bank still keeps bold. Above Drizzlecombe and Shavercombe 
the river enters a gorge, which extends beyond Langcombe. 
In this gorge there used to stand, a few years back, a thorn-tree, 
dwarfed, stunted, and distorted out of all resemblance to most of 
