Can you give me a grid.... There were 4 shafts it appears....
I quote "Whim Shaft, 2o yards N of the road and 935 yds E of Victory Inn, Footway shaft 50 yards NW of whim, and a 3rd shaft 70 yards NNE of Whim"
And there was Wheal Tallack shaft at the edge of the Wheal Towan sett...
Your shaft is probably one of the first two given as they were connected by a cross-cut... hence the opening with little else done.
The mine worked the eastward extension of the Wheal Towan Lode.
I will dig a bit more but need your GR to really answer this.
Regards ICLOK
Aaaaaaaaaaaaaaaaaaagh Creeper!!!!!