The Morgan family had acquired the Monksfield estate during the 17th century and were Cromwellian settlers of Welsh origin. By patent dated 8 Feb 1667 they were granted lands in the barony of Dunkellin, county Galway, the barony of Erris, county Mayo and in county Clare. In 1824 Charles Morgan is recorded as a resident proprietor in county Galway. The Morgans were obliged, due to indebtedness, to sell the estate in the 1850s. The county Clare portion, 770 acres at Cappagh in the barony of Burren, was advertised in December 1854. The Rev. Henry Morgan was Rector of St. Nicholas' church, Galway at this time.
- Encumbered Estates’ Court Rentals (O’Brien), Morgan estate including Monksfield, 13 July 1852, Vol 17, MRGS 39/008, (microfilm copy in NUIG); National Archives of Ireland
- Encumbered Estates' Court Rentals (O'Brien),estate of Henry McNamara Morgan, 6 December 1853, Vol 25, MRGS 39/011, (microfilm copy in NUIG); National Archives of Ireland
- Land Judges' Court Rentals (O'Brien), McNamara Morgan, 14 January 1879, Vol 135, MRGS 39/060, (microfilm copy in NUIG); National Archives of Ireland
- Land Judges' Court Rentals (O'Brien), McNamara Morgan, 29 June 1878, Vol 133, MRGS 39/059, (microfilm copy in NUIG); National Archives of Ireland
- Monksfield. Photograph. 096/019.; Irish Architectural Archive
- Encumbered Estates’ Court Rentals (Dunboyne), Morgan (Co Clare), 5 Dec 1854, Vol 6, 173; James Hardiman Library, National University of Ireland, Galway
- Encumbered Estates’ Court Rentals (O’Brien), Morgan, 5 Dec 1854, Vol 32 (41), MRGS 39/014, (microfilm copy in NUIG); National Archives of Ireland
Contemporary printed sources
- LEWIS, Samuel. ''A Topographical Dictionary of Ireland''. London: S. Lewis & Co., 1837: Vol II, 151.
- DUTTON, Hely. ''Statistical and agricultural survey of the county of Galway''. Dublin: Royal Dublin Society, 1824. : 416
- PARLIAMENTARY PAPERS. ''15th Annual Report of the Commissioners of Public Records Ireland,'' 1825. Vol XVI, Appendix I, Grants under Acts of Settlement: 163
Modern printed sources
- ''The Irish Genealogist'': MELVIN, Patrick. The composition of the Galway gentry. (1986), 93.
- BLAKE, Tarquin. ''Abandoned mansions of Ireland''. Cork: Collins Press, 2010.: 124-129 (Monksfield)
- MELVIN, Patrick. ''Estates and landed society in Galway''. (Dublin: Éamonn de Búrca, 2012). : 42