crest forced the team to abandon their original goal. Moving down the southern slopes, however, many hidden features emerged, including enclosure ditches, pits, possible buildings and other clusters of anomalies. The geophysics highlighted a large rectilinear enclosure, which was subsequently singled out for excavation. This revealed the remains of a Romano-British house with tesserae (mosaic) floors and painted wall plaster on the southern slope of Round Hill. The area also contained an Iron-Age cobbled floor, together with post holes that could have related to a structure. Further investigations found Iron Age rubbish pits distributed all over the valley, suggesting widespread settlement throughout the period. Pottery finds indicated that most activity took place in the earlier and later phases of the period, with a quieter occupation phase in the middle. The geophysics surveys also uncovered more suspected Iron Age enclosures along with what appeared to be a Roman road, which would have been associated with the site. The overall chronology suggested by the excavations is of the site being occupied since the Bronze Age around 1000 BC, the hillfort and surrounding farms dating from around 600 BC, followed by a move down towards the southern part of the site around 300 BC. The area was then abandoned, until the construction of the Roman villa. Among the many artefacts found in the area are an oval bronze shield around 35 cm in diameter, retrieved from the nearby river Isis in 1836 and the 70 cm long Wittenham Sword and scabbard, found in 1982 and dating from the Late Iron Age (120 BC - AD 43) In February 2021, archaeologists headed by Chris Casswell from DigVentures announced the discovery of at least 15 roundhouses dating from 400 to 100 BC. and remains of Roman villa dating from 3rd to early 4th century CE. According to excavators, members of noble family would have lived in this Roman villa. Researchers have also revealed some Roman kitchen utensils and an Iron Age "fridge" or pantry-ceramic food storage containers to keep food cool and safe in a pit dug into the ground. Poetry The eastern side of Castle Hill is the location of the Victorian 'Poem Tree', a beech tree which had a poem carved into it by Joseph Tubb of Warborough Green in 1844–45. The tree, which died in the 1990s, collapsed in 2012; there is now a stone commemorating the 150th anniversary of the carving.