15Walsh, Aidan. "Excavation at the Black Pig's Dyke." Clogher Record 14.1 (1991): 15-26.
Not only was Walsh's work the first scientific excavation of the Black Pig's Dyke, it was also the first professional archaeological dig ever to take place in Co Monaghan, according to this newspaper story. As a part of the 2012-2017 Co Monaghan Heritage Plan, a new archeological exploration of the Dyke has been proposed. More details here.