Archaeometry 40, 1 (1998), 187-216
A geophysical survey was conducted at Boden Vean, St. Anthony Meneage, Cornwall, over the site of a buried chamber thought to be the remains of a souterrain or fogou. A combination of geophysical techniques was successfully applied including an experimental microgravity survey over the location of the buried chamber itself. Magnetometer survey revealed a complex palimpsest of archaeological activity extending throughout the surrounding landscape, centred on a rectangular ditched enclosure containing the fogou. A series of gravity anomalies were recorded in the vicinity of the latter which were consistent with the collapsed section of the feature recorded by the Cornish Archaeological Unit. Further gravity anomalies suggested the presence of additional void features, possibly related to the extended passages of the fogou.
St Keverne local history website has this interesting page by Margaret Hunt,
Amazing pictures and details of the excavation carried out Oct 2003......
The fogou tunnel, when excavated, revealed a magnificent structure with walling up to 1.5 m high and a scatter of huge lintel stones lying haphazardly just above the floor level. A possible human tooth was found lying near the floor surface next to pieces of black burnished ware pottery.