Lionel D'Arcy, residing at Rockhill, Oranmore, is recorded as the owner of over 1400 acres in county Galway in the 1870s.
- Kelly and D'Arcy Deeds. LE15; James Hardiman Library, National University of Ireland, Galway
Contemporary printed sources
- HUSSEY DE BURGH, U. H. ''The Landowners of Ireland. An alphabetical list of the owners of estates of 500 acres or £500 valuation and upwards in Ireland''. Dublin: Hodges, Foster and Figgis, 1878. [available online at www.askaboutireland.ie] : 116.
- PARLIAMENTARY PAPERS. ''Return of owners of land of one acre and upwards, in the several counties .... in Ireland''. HC 1876, LXXX: 295
- ''GRIFFITH'S VALUATION OF IRELAND'[Primary Valuation of Tenements]', 1850-1858. : Galway Union, 198.