Rosalie, you could try Proni. They hold the following, although check that the 1797 - 1867 leases are for Glassmullagh, Lack. Carole. Public Record Office for Northern Ireland PRONI Reference : D1390/6/10 Level : Series Access : Title : Copy title deeds and testamentary papers Dates : c.1715-c.1940 Description : Box of copy title deeds, testamentary papers, etc, of the Archdale family, re the Archdale estate, Co. Fermanagh, comprising amongst others: Schedule of deeds entitled "Documents in Tin Box 1904" of the Archdale family re Dromore, Glassmullagh, Knockroe, Roscolbane, Trory, Camcool, Shanmullagh, Tullyloan, White Island, Ferney island, Laragh, Drumgarron, Conerick, Ring, Tullyavey, Tullyclea, Kilgartnaleague, Derrygore, Kilmacormack, Drumcoo, tyaght, Cappy, Coolnashanton, Toneyreagh, Derrybrusk, Bill Hill, Derryinch, Drumrainy, Drumcullion, Derryargon, Magheradunbar or Dunbar, Magherahae, Claragh, Blayney West, Legnagea, Carn Green, Barrack, Carn Green estate. (1715-1900) _______________________________________ Public Record Office for Northern Ireland PRONI Reference : D3007/A/23/26 Level : File Access : Title : Leases of the townland of Glassmullagh, Co. Fermanagh Dates : 1797-1867 Description : Leases of the townland of Glassmullagh, Co. Fermanagh; two of the leases also include and in Drumcrin. [For Drumcrin see also D3007/A/23/47.] 1796-1802 Freehold List, Co. Fermanagh, Weir Thomas Mulbane Drumkeerin 1796? This was the only Weir I could see in your area, you can check this list on Proni.