https://www.google.ie/maps/place/Derreennalomane,+Co.+Cork/@51.5863811,-9.5281993,15z/data=!3m1!4b1!4m2!3m1!1s0x48459f1017e6ba6b:0x2600c7a7bb4c0372

Dereenlomane Barytes Mine

This was originally worked as a copper mine by the Rev. Traill of Schull, assisted by Captain William Thomas in 1840 and they sold 19 tons of copper.  They discovered barytes or barium sulphate, a heavy white mineral, used for paint, papermaking for which in the 1850s there was a limited market.  An early use was by Josiah Wedgewood in the making of pottery.  In 1863 Captain Thomas was chartering boats c 160 tons and shipping the barytes to Messrs Martyn Dennis Liverpool and around 150 people were employed.  That year there was a serious flood which resulted in the mine being non operational for a period.  In 1867 the mine at what was described as Cahirolickaney Mountain was inaccessible and Captain Thomas built a road from the mine to the Dunbeacon Road nearly a mile long in three weeks.  It was marked by a celebration…