Counties of Ireland were later subdivided into smaller "liberties", which appear to have enjoyed the same privileges as their predecessors. The division of Leinster and Munster into smaller counties is commonly attributed to King John, mostly due to lack of prior documentary evidence, which has been destroyed. However, they may have had an earlier origin. These counties were: in Leinster: Carlow (also known as Catherlogh), Dublin, Kildare, Kilkenny, Louth (also known as Uriel), Meath, Wexford, Waterford; in Munster: Cork, Limerick, Kerry and Tipperary. It is thought that these counties did not have the administrative purpose later attached to them until late in the
Irish migration to Great Britain and domestic labour. The extent of the Irish contribution to Britain's construction industry in the 20th century may be gauged from Sir William MacAlpine's 1998 assertion that the contribution of the Irish to the success of his industry had been 'immeasurable'. Ireland's population fell from more than 8 million to just 6.5 million between 1841 and 1851. A century later it had dropped to 4.3 million. By the late 19th century, emigration was heaviest from Ireland's most rural southern and western counties. Cork, Kerry, Galway, Mayo, Sligo, Tipperary and Limerick alone provided nearly half of Ireland's emigrants. Some of this