1. Prominent earthworks of an apparently engineered road, or trackway: the feature's projected line joins with the current trunk road (A44), c.175m to the WNW; to the SE its line is perpetuated for 1.8km by minor lanes, joining the A44 at SO17715824: presumably a disused section of 18th/19th C. turnpike, unconnected with the route of the Roman road W of Hindwell/Walton (Nprn400040).
The road from New Radnor to Rhayader, depicted on e.18th C. mapping & described in a road book of 1841 (Colyer 1984 'Roads & Trackways of Wales', 88; Davies 1937 (Trans. Rad. Soc.7), 20), passes to the N of Mynd before running through Gwernyrargllwydd, so that this route may head towards Llandrindod Wells, via a section between Castell Crugerydd & Blaen Edw (Nprn401001); however further earthwork features (Nprn400998) appear to link the A44 E of Castell Crugerydd with the Gwernyrargllwydd - Rhayader route: a further route - across Llandegley Rhos (Nprn400042-3), is considered seperately.
RCAHMW AP94-CS 0535
J.Wiles 09.08.2004.
2. From aerial photographic and Ordnance Survey 25-inch mapping evidence (first edition 1889, second edition 1903), it would appear that the road, rather than re-join the present alignment of the A44 at SO16165936 as suggested above, turned to the north at SO16345930 and followed a curving route northwards, west then southwest, crossing the present A44 at SO15905954. (The first part of this route is more clearly shown on the second edition map than the first edition) A track continues past this crossing point to the west then northwest, to pass Gwern-yr-Arglwydd farm on its west side.
See also nprn 423252, relict road east of Forest Inn.
B.A.Malaws, RCAHMW, 31 August 2018.