Wylfa is currently the site of one of the largest archaeological digs in Europe, as a statutory requirement of the proposed new power station development. Volunteers are here digging a section of a neolithic henge, a massive circular ditch around the crest of a hill.Each ‘event’ on the site has to be accurately recorded by meticulous measured drawings. Here, below, artist and fellow volunteer Trish Bould has prepared the site for detailed recording of a round house just outside the circular henge. This has been identified after first of all a geo-physical survey, secondly, a visual identification of slight variations of colour in the soil, ringed in spray paint, and then many days of patient scraping away at stake-holes to reveal the individual stake holes in their circular form. The process of digging is like sculpture in reverse while the process of revealing and recording is like drawing on the land.Even the little measured recording drawings of each stake-hole have their own fascination as we enter into the discipline of another kind of drawing process.