OS record card description from 1972:

Fron-Haul is an Iron Age defended settlement [promontory fort] occupying a north-east falling spur of ground above the confluence of two streams. It is bounded on the south-west side by twin parallel ramparts with outer dicthes, extending 40.0m from the edge of steep slopes at the east end to within 15.0m of a rivulet (fomerly marshy ground?) at the west end. The ramparts are 10.0 to 12.0m in width, 0.9m in height; the ditches, 8.0m in width, and 0.2 to 0.3m in depth, but the earthworks, at present under pasture, have been reduced and spread by the plough.

There is no evidence of artificial scarping around the remainder of the enclosure and the slopes are not very steep so that reliance for defence must have rested upon the marshy nature of the twin stream beds. The original entrance was probably at one end or other of the ramparts.'

Additional notes from field visit by T. Driver on 14th March 2007:

The promontory fort is in a secluded position, with limited views out across surrounding higher hills. The twin ramparts are well preserved; both are flanked by outer ditches on their southern sides although the inner is not depicted in the OS plan. Both ramparts are also higher and steeper on their forward-facing, southern, sides. A modern track along the eastern terminals of the ramparts gives access for vehicles down to the river confluence and trucates the original ends of the ramparts. No features are visible in the interior and, save for a diagonal set of landdrains crossing the field to the south of the fort, the pasture within and outside the promontory fort is largely featureless. A potsherd was collected from a molehill in between the two ramparts on the eastern side of the interspace. This has a coarse black surface, a pale white fabric with large red inclusions. It is to be sent away for further examination.

T. Driver.