Alfred Watkins thought Bache Hill was on a ley going through the Four Stones:
The second ley [through the stones] starts from Bach Hill (one of the highest parts of the Radnor Forest); through the Four Stones, dead on main road through Walton village, dead on main road past Eccles Green, through Upperton Farm and Kenchester Church, and dead on the present road which is the S.W. boundary of the Roman station of Magna; then going over the Wye through Breinton Church.
In ‘Early British Trackways’, which can be read at the Sacred Texts Archive.
see
sacred-texts.com/neu/eng/ebt/ebt14.htm
It would be interesting to see what Morfe’s link below (to ‘Megalithic Mid-Wales’) said about the alignment – but the website seems to have gone.