The parish of Llangarron is in the south-west of the county and is believed to give clues about the land which was not subsumed into the surrounding manors post the Conquest. 

The 1884 plan of the Newcourt estate was made when the part enclosed by a loop of the river Garron was still extra-parochial, having been granted to Monmouth Priory soon after 1100. See TWNFC, 2007, Villa Cachebren, pages 112-9, downloadable here. Additional land had been added to the original estate, some of which was in Llangarron.