The following notes written some years ago come from pamphlet on the history of St. Eval Airfield by Mr Alan Bell.
"In 1955 and 1956 a Mr E. Greenfield carried out excavations on behalf of the Ministry of Works on the site currently occupied by Trevisker School and playground.
An excellent report headed "The Excavation of Bronze Age and Iron Age Settlements at Trevisker, St. Eval, Cornwall" was published by the Prehistoric Society in 1971.
This summary indicated that the site was first occupied in the Bronze Age by a small agricultural settlement, consisting of two circular timber houses; one house was eventually replaced by a stone structure. A single radio carbon determination suggests that the settlement was dated within the period 1700-1300 BC.
With the number of scattered barrows in the district it has been postulated that in the Bronze Age there would have been a population of 200-250 in 30 to 50 scattered homesteads, like Trevisker, on some 2,500 to 3,200 acres of cultivable land.
The Iron Age settlement was established on the Trevisker site probably in the second century BC or earlier. An original inner enclosure, half an acre in area, housing a single defended farmstead, was later super-seded by a larger defended enclosure. This covered three acres and contained circular timber houses and occupation areas. This phase was followed at the end of the first century AD by a Romano-British period of occupation, which lasted until the middle of the second century.
Trevisker bound lay in an area densely occupied in the Iron Age - there were at least 16 known or presumed Iron Age sites within a seven miles radius. These included the cliff castles of Redcliff Castle and Park Head in the St Eval parish and the great contour hill fort of Castle-an-Dinas. Seventeen iron specimens excavated from Trevisker were analysed and these varied widely from high silica slags to samples with 50% to 60% iron. This provides proof that iron, albeit impure but typical of the period, was smelted nearby even though a furnace has not been discovered. However, it is likely that the iron ore was of local origin as Carnewas Point mine was worked in the late 19th century.
By this period the settlers were living in stone huts with slab lined drains, and it is likely that the cattle were enclosed at night or in inclement weather. Spindle whorls were found indicating that sheep were kept and their wool used for clothing. The existence of rotary grinding wheels and clay ovens suggest that cereals were cultivated."
The following info on Trevisker pottery I found in the Proceedings of the West Cornwall Field Club.
(Don't bother looking up info on Trevisker pottery on the net, there is none)
The pottery from Trevisker round, St. Eval is from a site which it was possible to distinguish several stages of occupation.
This was the first Bronze Age site of this kind in the U.K. and it has given us very valuable information about the developement of Cornish Bronze Age pottery.
It has proved possible to distinguish four main classes or styles of pottery which were in use successively by occupants of the site. these syles have been numbered I to IV in order of age.
Generally thick, heavy and coursely gritted, but well fired. The pots were probably two feet tall, with out-turned internally bevelled rims and large ribboned handles or similar lugs of simpler form. Some pots had their bases stengthened on the inside with crossed raised ribs
Similar to style I, except that the pots have flat-topped clubbed rims, and there may be horizontal ribs on the side of the pot
This style is dark in colour, and less hard fired than style I. The pots are rather barrel shaped with rims either slightly bevelled or else flattened. The decoration is by fine plaited cord arranged in a zone on the outside of the pot imediately below the rim. Paired dimples placed the zone of decoration to represent ribbon handles are a feature of this class.
This style is generally reddish brown in colour. Cord decoration is replaced by incised decoration made by scoring the surface of the pot prior to firing, but patterns remain the same. Both small perforated lugs and finer dimple handles are found on these pots.
This style is generally brown or dark grey, harder, grittier and better fired than the preceeding styles. These pots are barrel or flower pot shaped and the rims may be flat topped, everted, of have bevel on the inner side. The decoration includes incised, finger-nail and finger-tip techniques. The patterns are probably derived from those of I-III. Cruciform base-strenghtened ribs and perorated lugs also occur in this group. There is a considerable range of fabric and size within this style and both large , course storage jars and smaller, finer cooking pots are represented.