Another religious house possibly founded by Fergus was the abbey of Soulseat, a Premonstratensian house seated near Stranraer. Walter Bower and the necrologies certainly state as such. However, the fact that this house appears to be identical to the ""Viride Stagnum"" attested by the contemporary "Vita Sancti Malachiae" seems to be evidence that Soulseat originated as a Cistercian house founded by Máel Máedoc himself. If Máel Máedoc and Fergus met during the former's apparent stay in Cruggleton, it is conceivable that Fergus granted him the lands upon which he founded a religious house at Soulseat. If Máel Máedoc indeed founded a Cistercian house on this site, it clearly was converted to a Premonstratensian monastery not long afterwards, under the advocacy of Fergus. The church of Cruggleton, near the site of the like-named castle, could have also been constructed by Fergus.