During transportation, a 5.08-tonne piece broke away from the initial 20.32-tonne block, and was subsequently returned to the grounds of Bedwellty House — home of the Homfray family.
Yn ystod y cludo, torrodd darn 5.08 tunnell oddi ar y bloc cychwynnol oedd yn pwyso 20.32 tunnell, ac wedi hynny fe’i dychwelwyd i dir Tŷ Bedwellte - cartref y teulu Homfray.