acquired approximately 30,000 acres (120 km2) in the Kenmare area, in southwest Ireland, and £9,000. This was described in Aubrey's Biography of Petty as "50,000 acres [200 km²] visible from Mount Mangorton". By 1658, when Cromwell died, Petty owned so much Irish land that he essentially owned what is now County Kerry and held the title Earl of Landsdowne, Landsdowne being a new British name for Kerry. The English gentleman, Evelyn, who knew Petty well, spoke of him: The map of Ireland, made by Sir William Petty, is believed to be the most exact that ever yet was made of any country. Resulting documents The resulting maps of the parishes, all drawn by Petty himself, were preserved in the Surveyor General's office and in the Public Record Office in Dublin. The original Down Survey parish maps were lost in a fire in the Surveyor General's office in 1711, and the authenticated copies of the parish maps were lost in fires at the Public Record Office in the Four Courts during the Irish Civil War of 1922. Petty also edited the parish maps into barony maps. The details listed in terriers beside the maps include the names of previous owners of the lands, religious affiliation, land valuation, and area. The maps themselves include townland boundaries, and sometimes houses/castles, roads and fields. It listed the owners of land in 1640, and the new owners. Considering the time and circumstances in which these maps were executed, their accuracy is surprising, and they continue to be referred to as trustworthy evidence in courts of law even at the present day. Parish maps Copies of a number of the parish maps survive in various institutions. The National Library of Ireland holds a set of Down Survey parish maps copied by Daniel O'Brien in the 1780s and purchased in the 1960s from a firm of Dublin solicitors. These maps cover land in counties Cork, Dublin, East Meath (Meath), King's County (Offaly), Leitrim, Limerick, Longford, Queen's County (Laois), Kilkenny, Tipperary, Waterford, Westmeath, Wexford and Wicklow. In some cases, summary barony maps have been included, though these barony maps are not necessarily fully comprehensive. Barony maps Some copies of the original Down Survey barony maps survive. The Public Record Office of Northern Ireland (PRONI) has a set in the Annesley Collection. The British Library acquired another set in recent years. The best set, a personal set of Sir