Sheridan, Taylor, Quinn, Reilly, Graham, Gerty, Watt, Baxter, Matthews, O'Brien. The Ordnance Survey Name Books for 1836 give the following description of the townland- Mullach Dubh which means Black Summit. This was in old times considered a part of Cavans & in patent called Cavan Mullaghduff. Property of Montgomery. Rent from 14 shillings to £1 per arable acre. Gravelly soil. Stone houses. Crops are oats, rye, flax and potatoes. Road in good repair. Inhabitants are comfortable. The Mullaghduff Valuation Office books are available for 1840. Griffith's Valuation of 1857 lists the landlord of the townland as Netterfield and the tenants as Cochrane, Quinn, Fallon, Moore, Faris, McGinn, Reilly, Graham, Gallahar and Roe. Census In the 1901 census of Ireland, there are six families listed in the townland. In the 1911 census of Ireland, there were seven families in the townland. Antiquities The only items of historical interest are the disused Cavan & Leitrim Railway and a sandpit. References External links The IreAtlas Townland Data Base Townlands of County Cavan