NAR SN56NW1

Castell Bach is a partly bivallate small hillfort, 75m x 47m, commanding an inland promontory with exceptional views over the coastal plain at Llanrhystud. The natural approach is from north, perhaps following line now marked by a walled hollow lane of some antiquity.

The fort is oval, with a single low rampart defending the steepest slopes on the west side (now much reduced by ploughing), but having on all other sides a substantial single rampart with an outer ditch below. Beyond this is a second ditch defending the shallower saddle of ground on the east and south sides only. The positions of both ditches are only known from aerial photography in parchmark conditions taken in 1995 (RCAHMW neg. ref. 955142-55). There is no evidence that any sort of secondary rampart stood between the two outer ditches, although parchmarks show possible traces of a palisade trench on the outside lip of the inner ditch, at the foot of the main rampart. The site of the main entrance appears to be marked by an oblique track entering the fort on the east side; parchmarks clarify the entrance arrangements showing the north rampart swinging out to form the entrance trackway, discontinuous with the remainder of the rampart on the east and south sides.

The main single rampart was originally walled with dry-stone, and this is evidenced by several well-preserved stretches of walling at points around the circuit. The stone facing probably took the form of a single walled elevation, although close to the entrance on the east side there may have been two or three sets of rampart facing, shown by apparently in situ blocks and wall-courses stepped out at different positions. This may be the effect of slumping in antiquity. Mid way along the east side, there is evidence for a more complicated rampart arrangement with a stone-faced 'footing wall' at the very top of the rampart, perhaps for a palisade, with traces of the rampart face proper below, slightly stepped out. Below this the angle of the surviving rampart is shallower and probably comprises a mass of tumbled material concealing the lower courses of the rampart face. Excavations at Castell Henllys, Pembs, has demonstrated that rampart faces may indeed slump forward or be superseded by later walling at a higher level. The whole circuit is damaged by erosion, slippage and sheep-scrapes. Where the original rampart face has fallen away, the characteristic rubble make up of the rampart core comprising horizontal blocks often laid at right angles to the wall face, can be seen (also seen at Pen y Castell, Bontgoch, and Caer Argoed nearby).

The steepest and best preserved defences survive at the southern tip of the fort where the intention was clearly to cut a deep notch in to the hillslope which would be (and still is) highly visible from below, signalling the position of the fort.

The interior of the fort is reduced by ploughing and almost featureless, save for a quite large, shallow hollow discernable in the NE part marked by a semi-circular patch of nettles denoting buried phosphates. This could be seen as probable evidence of a substantial house platform.

The lane which approaches from the coastal plain, up between Castell Mawr and Castell Bach, is known locally as 'the lane of the wounded' or 'the dell of slaughter' (local knowledge appears to vary), a notable place-name said to relate to a battle between the two forts. The landowner of Pen y Castell farm told TGD on 15th March of a find of a probable spindlewhorl (by its description) on the slopes east of Castell Bach at approximately SN5395 6878. The find was taken to a 'weaver from Newquay' for identification and now resides there.

Visited T Driver, RCAHMW & A Fleming, UW Lampeter, 15th March 2002.