A settlement comprised of building platforms, large and small enclosures and a network of field banks lies on the east face of Allt Fach, high above the Tawe Valley, at a height of between 300m and 350m above OD. The site occupies a slight terrace which, dropping steeply from north to south, has created a break in the otherwise sheer east-facing slope. Though the site may comprise features of different periods, it has the overall appearance of an upland late medieval/ early post-medieval farmstead with goose pens and/or pigsties which take the form of hut circles.
See component site records (301522-40).
Some of the above features have already been mapped by Ordnance Survey (probably aerially) and appear on the 1:10000 scale mapsheet (1978).

David Leighton & David Percival, RCAHMW, 1988

Summary description of features:

Enclosures, building platforms and possible 'hut circles' lie along a terrace on the E face of Allt Fach between 300m and 350m above O.D.
SN84541745: an irregularly shaped enclosure, largest dimensions 80m (N-S) by 51m bounded by a spread stony bank 2m wide and 0.4m high with a 6m gap in the NW corner. Three small platform features lie along the inside of the bank on the W and a small enclosure is built into the end of the bank on the W side of the gap.
SN 84561754: to the NE of the above, a series of sinuous banks form an enclosure, open on the NW, measuring 37m (NE-SW) by 50m and bounded by a stony bank spread to 2m wide and 0.4m high. A small sub-rectangular enclosure measuring 10m (N-S) by 4.5m within banks 1.2m wide and 0.4m high, lies in the S corner. A small platform feature lies on the NW.
SN 84531739: to the S of the main enclosure is a house platform, the level area of which measures 8m (NW-SE) by 5m, built out to 1.5m high and cut back to 0.8m deep. A possible hut circle, platformed into the hillside, lies on the immediate SW.
SN84531736: a platform measuring 8m (NW-SE) by 7m, built out on the SE to a height of 1m and cut back to a depth of 1m on the NW, revetted at both ends. It is bounded on the NE and SW sides by stony banks 0.8m wide and 0.4m high. To the immediate S and E of this latter platform is a network of ill-defined banks averaging 1m wide and 0.3m high. They are cut through by a modern drainage channel which also transects the two enclosures described above. A possible hut circle is incorporated in an enclosure formed by some of these banks at SN84521735. A further possible hut circle lies towards the N end of the site at SN84571757.
Five small enclosures of probably more recent date lie at the far N end of the site. The largest, at SN 84511759, is sub-rectangular in plan and measures 13.5m (N-S) by 6.5m within a wall 1m thick and 0.8m high; there are two vague sub-dividing walls. A substantially built bank 2m wide and 1m high flanked by a ditch can be followed for about 110m from SN 84491763 to SN84411770.

A large stone, shown as a boundary marker on the O.S. 1st edition 6" sheet, lies at SN84551770 and can be seen clearly from the Cerrig Duon stone circle some 3km to the N.