 Although the Industrial Revolution did not much affect the rural parts of Clwyd , there was considerable industrial activity in the North Wales Coalfield in the north @-@ east of the county , particularly around Wrexham . The Bersham Ironworks at Bersham , in the same area , was at the forefront of technological advances and was most famous for being the original working site of the industrialist John Wilkinson who invented new processes for boring cannons . The Williams @-@ Wynn family of <unk> had become rich after the dissolution of the monasteries and owned vast estates in Clwyd with resources including lead , tin and copper as well as corn and timber . 
