Wheal Ruby & Garlidna were worked together along with an outlier to the south east known as Polangrean, Polgrain or Polangrain,( I would think the former spelling is the more correct).
Records of these mines go back to 1758
In 1835 the group were known as The Wendon Royal Mining Co', for no other reason than the mines lay on Duchy land.
By 1865 the group were known as Garlidna United.
They were equipped with a 65" pumping engine which not only pumped the water but also the pockets of the share holders.
There was also a 24" winding engine which also drove the stamps, the mines at this time employed 53 people
According to Spargo the mines closed in 1867 because of the inability of the share holders to pay their dues
There could however be another reason ( Geof would be far more qualified than I to explain this )The ore from this area was contaminated with specular iron known as glist.
My records show that in 1880 Garlidna & Polangrain sold 20 tons of tin, but this may have been a result of cleaning up the floors.
The mines were at work again in 1912-16 but with little more success than before and according to my Grandfathers angry notes were salted