112 TRANSACTIONS OF THE PLYMOUTH INSTITUTION. 
back of this chamber is built with fairly-placed hewn stones ; the 
front wall is composed of smaller stones, more roughly placed 
together, whilst the roof is formed of hewn cover stones, buried 
in soil and vegetation. The bottom of this chamber is peat soil, 
with no paving. The internal stones appear to have been subject 
to the action of fire, and in the crevices between them I 
collected some fine dust, which still shows traces, on examination, 
of tin and lead. The black mould in the bottom has been 
thoroughly examined, but no trace of fused metal was discovered. 
The western end of this chamber communicates through a flue, 
with a recess in this corner, and was evidently some portion of 
the furnace arrangement. JSTo outlet is visible on the eastern 
side. There are no water-power remains. 
On the eastern side of the house, and distant about six feet, is 
a curious mould, hollowed out of a rock which slightly protrudes 
above the surface. It is twenty-six inches long, and twelve inches 
wide by five inches deep at one end ; whilst it is fifteen inches 
wide, and two inches deep, at the other. The rock in which this 
mould is cut inclines from the deeper to the shallower end, so 
that when filled with metal the ingot would start with being two 
inches thick at the wider end, decreasing in thickness until it 
reached the narrow, or upper end, when it would run out to a 
thin cake. I have hitherto seen no other mould of this shape 
and dimensions. 
About two to three hundred yards north of this blowing-house, 
and on the slope of the hill facing the valley of the Swincombe, 
is a large hut-circle, twenty-four feet in diameter, having on it a 
wall rising to a height of four to five feet, similar to the hut circle 
above Week Ford. 
Further up the gorge, beyond the blowing-house, is a large 
granite boulder, one end of which is resting on a sloping piece of 
ground, and the other on a dwarf wall, so that the height of the 
space covered and enclosed is two feet. 
There is room for three or four men to crawl in and lie down, 
and thinking it may have been used as a sort of lair, I excavated 
about a foot of the floor, and carefully sifted the same. No traces 
of human habitation were found, and I therefore consider this 
curious primitive-looking cavity to be a cache, or hiding-place, 
either for metal or tools. A few lumps of turf would most 
effectually conceal the entrance and defy even a close search. 
