 He became very wealthy from his numerous mining interests in the district.One was the Santa Gertrudis Mine, which by 1898 was one of the most productive in the State of Hidalgo under Cornish management.Four extant Cornish mine engine houses, and the English Cemetery ("Panteon Inglés") containing the graves of hundreds of Cornishmen in Pachuca, bear witness to the Cornish contributions to Mexican silver mining for over a century.