This ballad was written by Abel Jones 'Bardd Crwst' (1829-1901) and tells the story of the accident which took place near Cwm-y-glo, Caernarfonshire, on 30 June 1869. Two wagons of Nitro-glycerine oil which were on their way to the nearby slate quarries exploded, killing five and injuring several others. The names of the victims, which included two young boys, as well as the names of the injured men are listed on page 1.