Complex sentence: Millmannoch, Milnmannoch or Kilmanoch (cell of the monk) was in the old barony of Sundrum, in 1373 held by Sir Duncan Wallace, who had also the barony of Dalmellington.
Split into simpler sentences: Millmannoch, Milnmannoch or Kilmanoch (cell of the monk) was in the old barony of Sundrum. In 1373 by Sir Duncan Wallace, who had also the barony of Dalmellington.