Fir Hill Mine (Wheal Aaron), Grid Reference: SW869618
A small mine worked for ochre and umber during the 19th century. The workings were from open cuts on the south side of the valley to the north, and from shafts west of the woodland. Four open shafts visible in 1958, but these have now completely disappeared.
Fir Hill Mine is probably the same as Wheal Aaron, which is reported to have been active on the estate of Little Colan in 1847.
References; A.K. Hamilton Jenkin: Annotations to Ordnance Survey map, scale 1:10,000, sheet 40NW