George Montgomery died in 1841 and his estate went to his Enery cousins of Bawnboy. In 1856 they sold the estate to take advantage of its increased value owing to the opening of the Woodford Canal through the town in the same year. The estate was split up amongst different purchasers. In the Fermanagh Poll of Electors 1788 there was one Cullyleenan resident, John Graham, who was entitled to vote as he owned land in Drumany Beg townland in Kinawley parish. In the 1825 Registry of Freeholders for County Cavan there was one freeholder registered in Cullilenon- John Reilly. He was a Forty-shilling freeholders holding a lease for lives from his landlord, the Montgomery Estate. He also appears in the 1827 Tithe Books below. The Tithe Applotment Books for 1827 list the following tithepayers in the townland- Keon, Grimes, Wynne, Clark, McLaughlin, Sturdy, Hanna, Donahy, Montgomery, Answell, Reilly, Brady, Sheridan, McGraugh, Benison, Gallagher, Murdy, Enery. In 1829 a Sunday school was kept in the townland, funded by the Hibernian Sunday School Society. The Ordnance Survey Name Books for 1836 give the following description of the townland- Coill Uí Lionáin, 'O'Lenen's wood'. South of Ballyconnell. Property of Montgomery. Rent £2 per arable acre. 10 acres of bog and 8 acres of pasture, the rest is arable land. It contains a bit of the town of Ballyconnell, the Roman Catholic church and several good roads. The Cullyleenan Valuation Office books are available for 1840. Griffith's Valuation of 1857 lists the landlords of the townland as Kane, Webb and Wilson and the tenants as Webb, McDermott, Donohoe, Rourke, Brady, Reilly, Maguire, McGaghran, Kelly, Flynn, Sullivan, Kane, Griffin, Roe, Gallaher, Roman Catholic Chapel, Gileese, Benson, Thompson and Wilson. Further information and a detailed map showing the location of each holding can be seen online. In the Dúchas Folklore Collection, a story by Miss Yeates, The Courthouse, Ballyconnell in 1938 relates a ghost story that occurred on Daisy Hill in Cullyleenan. Census In the 1901 census of Ireland, there are thirteen families listed in the townland. In the 1911 census of Ireland, there are fourteen families listed in the townland. The high population is because part of the town of Ballyconnell is situate in Cullyleenan. Antiquities An early-medieval earthen ringfort (Site number 489, page 70, Cullyleenan townland, in "Archaeological Inventory of County Cavan", Patrick O’Donovan, 1995, where it is described as- Raised circular area (int.