Archaeologists are launching a new dig to try to unearth the secrets of a 9th Century stone monument on a prehistoric mound. Bangor and Chester university experts will begin excavations at the Pillar of Eliseg near Llangollen, Denbighshire... Last year excavations focussed on the mound, which was identified as an early Bronze Age cairn. It followed on from one in the 18th Century. Professor Nancy Edwards from Bangor University told BBC Radio Wales: "...This year we are going back to the cairn to one particular trench because we discovered evidence last year of the dig into the top of the...