Arthur O'Conor , of the Palace, Elphin, co Roscommon. High Sheriff 1857. At the time of Griffith's Valuation, Arthur O'Conor was one of the principal lessors in the parish of Kilronan, barony of Boyle, parish of Kilcolagh, barony of Frenchpark and the parish of Kiltullagh, barony of Castlereagh. In the 1870s Arthur O'Conor's estate amounted to 6,927 acres.
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