I don't know where this can refer to. Perhaps someone reading will know. The folklore is just what you'd expect for a prehistoric site.
Gentlemen - Some few years ago I was travelling on a coach between Chepstow and Abergavenny, when my attention was drawn to some large stones lying prostrate on the right hand side of the road, but on which side of the town of Usk I cannot now remember.
.. I found that in the eyes of the coachman, and also of the whole neighbourhood, they were considered rather as a lion, not on account of being Celtic remains, but because it had required the united force of the farm-horses of the neighbourhood to pull them down, and that they could not even then remove the disunited masses from the spot.
Thanks, Mr Richard GP Minty for your vagueness. Perhaps the stones have gone now anyway? But you never know, especially if they were that stubborn.
from 'Archaeologia Cambrensis' v II (1847), p 275.
[...] Thanks to the members of the corps - about 20 in number - who, under the command of Captain Williams, proceeded to the camp on Saturday last, a sufficient number of tents had been pitched for our accommodation before our arrival en masse on Monday.
[...] There is nothing which indicates the whereabouts of the "soldiery" until one is as it were in the midst of them. The tents are completely hidden from view by the high ramparts which extend from the north-east to the south. The piece of ground enclosed within the ramparts is of a triangular form, the eastern line being formed by the waters of the Severn. Coming suddenly into a deep moat without the ramparts, one is as suddenly confronted by a sentry, marching with a soldier-like air, a guard-room, or rather a guard tent, and a number of the guard lounging about.
Immediately in front of the guard tent, there is a gap, cut right in the angle of the encampment, and looking through this the whole of the tents and their occupants within are at once visible, presenting to the visitor a lively and picturesque scene, of which, two minutes before, he could have had no perception.
[...] The weather has been glorious throughout the week, but the heat, which would be exceedingly oppressive in town, is rendered delightful here, with a stiff fresh breeze flowing across the water. Each day the men have worked and drilled with a subordination that would be creditable even to a soldier of long service, and order has been maintained night and day. Heavy gun drill has been gone into most zealously, and some good practice has been made [...]
Ghost stories are not wanting in the guard room, for one good reason. On the north-east are the ruins of an old Roman chapel known as the chapel of the Holy Trinity, and no doubt was connected with the Roman encampment. Sundry remains of the genus homo in decay have been found in this spot, although the outline of the graveyard which adjoined the chapel has been effaced. A sentry is posted in the vicinity of the old chapel, and more than one have felt a chill creep over him during the still hours; but it is unnecessary to mention the little rumours which have currency during the last couple of days.
I have forgotten to mention that the immediate vicinity of the camp is called Sudbrook, and also that the advantages of the spot were utilised as a place to land, conceal, and protect his soldiers by Oliver Cromwell before he stormed Caldicott Castle. The place is in the highest degree classic and historic ground, and is well worth visiting.[...]