106 
TRANSACTIONS OF THE PLYMOUTH INSTITUTION. 
house, has an internal width of four feet, and is about six feet 
high. The northern end of the wheel-pit is open, and partly 
blocking it is a stone with three more of the oval cavities. Scat- 
tered about are stones containing fourteen of these cavities, and 
more are concealed under the debris. 
The foundation of the launder carrying the water to the over- 
shot wheel is plainly visible, and here and there the leat supplying 
it can be traced up the valley to the river Wobrook. 
About two hundred and fifty yards south of the ruins, and 
about fifty yards west of the Wobrook, is a hut circle twenty-seven 
feet in diameter. The foundations appear to be Celtic, but it has 
a comparatively-modern dry wall erection on it, some six to seven 
feet high, forming a rough gable, and was probably utilised 
as a residence by the tinners working at the stream works 
adjacent. Higher up the hill are ancient enclosures mapping out 
the slope in squares. 
The Har Tor blowing-house is about two miles south-west of 
Princetown, on the head waters of the Meavy, close to the line 
of dam which would have formed the proposed Har Tor reservoir. 
The two ruins are situated on either side of the stream. 
That on the western side is sixteen feet long by twelve feet 
wide. The chimney is still standing to the extent of six feet 
in height. The breastwork rests on a massive lintel of granite, 
the aperture being four feet square. Two stones, with two 
circular cavities six to seven inches in diameter and three inches 
deep, are lying among the debris. The walls, mostly in ruins, 
are composed of rough moorstones, dry laid; some are, however, 
shaped. 
About fifty feet across the stream is the other ruin, twenty-two 
feet long and sixteen feet wide, with an entrance doorway on 
the south side three feet three inches wide and five feet high 
to lintel. This entrance is perfectly complete and intact. A part 
of the wall resting on the lintel is in good condition. The door- 
jamb and lintel are grooved and holed for door. 
The wheel-pit, with a width of ten feet, is on the eastern side 
of the house. It is deeper than the floor of the building, and has 
on the northern side an outlet for allowing the water after use to 
return to the stream a few feet below it. It is difficult to trace 
the ingress; but as the bed of the river a few yards away is 
