In 1849, Marquess of Bute bought the Cwmsaerbren farm from William Davies for £12,000. W. S. Clarke was employed to sink the first trial shaft in 1851. In April 1853 the first seam was struck at a depth of 125 yards (114 m). A second shaft had been sunk by 1855, when the first coal was produced. Progress was slow because all equipment was carried over rough tracks by horse and cart from the Taff Vale Railway's then terminus at Dinas.
- "Bute Colliery Treherbert". www.welshcoalmines.co.uk. Retrieved 30 January 2017.