300 TRANSACTIONS OF THE PLYMOUTH INSTITUTION. 
stated by him and subsequent observers to be unique. I have, 
however, found another, close by the square building just described, 
the entrances to which are defended in a precisely similar manner, 
and have observed modifications of this method of fortification 
at other points in the valley. I will deal more fully with these 
later on. 
The enclosure in question is somewhat irregular in shape; its 
longest diameter measures about 240 feet, and runs from north to 
south along the hillside; its shorter is about 200 feet, and runs up 
the hillside. Within the enclosure are six hut -circles, varying 
from twenty-two feet diameter, the smallest, to forty-three feet, the 
diameter of the largest. (See plan.) 
At the north and south ends entrances have been formed in the 
rampart, and these are protected by a curious arrangement of 
walls, designed evidently to prevent the sudden ingress of enemies. 
At the north entrance a cross has been built, athwart the gap in 
the main rampart, and, as you will see, any intruders would have 
to come singly, and would stand a fair chance of being knocked 
on the head by gentlemen posted within the inner angle. Mr. 
Spence Bate, in his sketch of this, showed an entrance also through 
the centre of the cross, but after careful examination I do not 
think this ever existed; and in the case of the other fortified 
enclosure near by, the centre of the cross remains intact at both 
entrances. 
The southern entrance presents a somewhat more complicated 
arrangement. On the outside of the enclosure the walls are 
practically the same as those to the north, except that the presence 
of a large block, which offered a good foundation, has caused the 
eastern wing to be curved somewhat at its end. 
But inside, in the place of the two arms of a cross, the circum- 
ference of a large hut-circle has been made do duty, and built 
out from the circle is a small square chamber very like a sentry- 
box, and probably used as such. 
To the east the width of entrance left by this arrangement was 
still considerable, and accordingly a short wing, twenty feet long, 
was added to the main rampart, running parallel to the circum- 
ference of the hut-circle, and at a distance of 2ft. 6in. from it. 
The other enclosure close by, of which the rampart is in places 
imperfect, has even more perfectly preserved entrances, but both 
of the simple cross type. 
