It has been suggested, although it is obviously far from certain, that St Conlus may be a variation on the name of the much more famous St Columba. The oldest gravestone in the churchyard dates from 1859. At least three former rectors of the parish are buried in the churchyard: Rev Henry Colthurst (rector 1862–1875) Rev Thomas Reddy (rector 1875–1884) Rev Thomas Fisher (rector 1887–1921) The parish existed as a 'stand-alone' entity (having been united with Ballyscullion parish for over a century beforehand) between 1795 and 1921, with a rector residing in the attendant Rectory for much of this period. After the death of Rev. Thomas Fisher in 1921, the parish was ultimately amalgamated with the neighbouring parishes of Maghera and Killelagh; this union was terminated in 1980, when the current union with Desertmartin parish commenced. Economy Knockloughrim is the location of FP McCann Ltd, one of Northern Ireland's biggest quarrying contractors, and are responsible for many major projects, including the construction of the Toome by-pass, which opened in 2004. Their facilities now encompass a large portion of both sides of the Quarry Road, just outside the village, including the old McLean's Quarry. References NI Neighbourhood Information System Draft Magherafelt Area Plan 2015 Go Ireland – Knockcloghrim Windmill Your Place and Mine – Knockcloghrim Windmill Villages in County Londonderry Windmills in Northern Ireland Mid-Ulster District