A resignation of the Wardenship of the stannaries had been extorted from him.
As a reward he was appointed in 1742 Warden of the stannaries.
As Warden of the stannaries he introduced reforms which greatly mitigated the hardships of the miners.
This is still the principal town of the stannaries, wherein the court is held relating to those causes.
The stannaries were divided into five districts, of which Penwith and Kerrier formed one.
This Prince 'much augmented the powers of the stannaries of Devon and Cornwall, and under his auspices they thrived exceedingly.'
In 1198 appears a letter from the Warden of the stannaries to the Justiciar.
His name was Simon Carfax, and he came as the captain of a gang from one of the Cornish stannaries.