The Mount Irvine estate (which sometimes appears in sources as Mount Irwin) was part of the Cooper estate but was let on a long leases to a number of tenants including the Thompson and Sherlock families. In 1853, the estate of William and Catherine Sherlock was offered for sale in the Encumbered Estates Court. The petitioners were Eleanor and Honoria Irwin. The Freeman's Journal reported that it was bought in trust by a Mr.Crawford, for over £3000. In 1873 John Sherlock, trustee, was offering for sale a Fee Farm rent of the estate of Anna O'Brien at Leaffony, barony of Tireragh, county Sligo.
- Encumbered Estates’ Court Rentals (O’Brien), Sherlock, 4 March 1853, Vol 20, MRGS 39/009, (microfilm copy in NUIG) ; National Archives of Ireland
- Landed Estates' Court Rentals (O'Brien), Sherlock/O’Brien, 21 November 1873, Vol 112, MRGS 39/051, (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, 95
- ORDNANCE SURVEY NAME BOOKS, County Sligo: Vol I, 428
Modern printed sources
- McTERNAN, John C. ''Sligo: the light of bygone days, Vol.I Houses of Sligo and associated families''. Sligo: Avena Publications, 2009. : 145-146.(Mt. Irwin)
- ''Freeman's Journal'': Incumbered Estates Court sale reports, 5 March 1853, p.4.