I've got a John Harries born 1845 at Llandeloy in my family tree. Mine had a sister called Letitia who moved to Cefn Cribwr and married Pemborkeshire born William Davies. He died 25 August 1892 at Park Slip when around 118 men and boys were killed in an explosion. Letitia died at Cefn Cribwr in 1909.
Letitia's parents were Thomas Harries and Martha Reynish.