There is some confusion about the name of this mine.

All known plans of the mine itself refer to it as “Prince Royal Mine”, however Ordnance Survey maps have, since the first County Series (1857-1884), consistently labelled this mine as “Princess Royal Mine” [ref].

Evidence of the mine still remains on the surface in 2024, in the form of Clwyd capped shafts a short distance from the road.

Dines:

Watkin’s Shaft, 200 yds. W. of the Perran Coombe stream and 400 yds. S.S.W. of Carnbargus corn mill, is vertical to adit (30 fms.) and on the underlie to the 40- fm. Level. Adit Level commences by the stream 220 yds . E.N.E. of Watkin’s shaft and follows the lode to it, passing Footway Shaft and Adit Shaft, situated respectively at 175 yds. and 115 yds. N.E. of Watkin’s.

The 10-fm. Level extends 23 fms. E. and the 20-fm., 30-fm. and 40-fm. levels block out the ground for 10 fms. E. and 20 fms. W. Stoping is not shown on the Mining Records Office plan, but that at the Duchy of Cornwall Office shows a small stope on the 40-fm. Level each side of Watkin’s Shaft.

There is another footway shaft, 320 yds . S.W. of Watkins, from which a drive at unstated depth follows the lode for 75 fms. S.W.

Records of output are:

• Prince Royal : 1825 and 1826, 206 tons of 64 per cent copper ore.
• Princess Royal: 1847 and 1848, 289 tons of copper ore.
• Prince Royal: 1887, 5 tons of black tin.

The mine was abandoned in 1890.

All features fall on private land a short distance from the road.