A stone-built cist grave carrying a skeleton and a mysterious metre-wide wall, missing from early maps and believed to have been part of a medieval monastic settlement, have been found by archaeologists during excavations carried out at a church in North Wales with foundations in the 6th century. Experts say they immediately realised the "huge significance" of a set of large flat stones a metre below the foundations of St Mary's Church in Nefyn, where the current building was built by the Victorians in 1825 before being converted into a museum in 1977. Lifting the stone cover, a skeleton --...