Its chief geographical features are the Slieve Rushen mountain on whose eastern slope it lies reaching an altitude of 320 metres above sea-level and some swallow-holes.
Taking advantage of this oversight, Lady Margaret O’Neill, the widow of Hugh Maguire (Lord of Fermanagh) claimed the land.
An order of the Lord Deputy dated 14 October 1612 states- Wheras The Lady Margrett ny Neale, wyddowe, late wyfe to Sir Hugh Maguyre knight deceased, hath discovered the parcells of land beinge eight tates, and doe lye betweene Knockneny in the County of Fermanagh and Tollagh in the County of Cavan and not within anie Undertakers portion who have since enjoyed the same as it hath been certified by the Surveyors ... we enact that the said Lady Margrett shall receive the next Hallowtyde rent due out of the said eight tates and thence forth until his Majesty decides otherwise.
[3] What happened next is unclear as James Trayle, who had been granted the nearby manor of Dresternan in 1610, began making leases of the lands in 1613.
In any event on 1 May 1613 he leased to lands of, inter alia, Knocktegall to Thomas Duffe McCorie, a mere Irishman for the term of one year.
[7] An Inquisition held in Newtownbutler on 23 March 1639 found that the said James Balfour owned, inter alia, the lands of Cnottitagill.
[10] In the Cavan Poll Book of 1761 there was one Knockateggal resident, James Elliot, who was entitled to vote in the Irish general election, 1761 because he owned land in Drumroe townland in Killeshandra parish.
[11] The Tithe Applotment Books for 1827 list the following tithepayers in the townland- Elliott, Emo, Prior, Clerk, McGuire, Curry, Drum, Beatty.
This was originally a medieval Roman Catholic church which served the inhabitants of Tomregan Parish who lived in County Fermanagh.