Silbury Hill

There have been several excavations of the mound, which attracted the notice of the seventeenth-century antiquary John Aubrey, whose notes in his Monumenta Britannica still await publication.[1]. Later, William Stukeley wrote that a skeleton and bridle had been discovered during tree planting on the summit in 1723. It is probable that this was a later, secondary burial, however. The first purposeful excavation came when a team of Cornish miners led by the Duke of Northumberland sunk a shaft from top to bottom in 1776. In 1849 a tunnel was dug from the edge into the centre. Other excavations were undertaken in 1867 and 1886, and William Flinders Petrie investigated the hill after the First World War.

In 1968-70 professor Richard Atkinson undertook work at Silbury in front of BBC television cameras. This last work revealed most of the environmental evidence known about the site including the remains of winged ants which indicate Silbury was begun in an August. Atkinson dug numerous trenches at the site and reopened the 1849 tunnel, where he found material suggesting a Neolithic date, although none of his radiocarbon dates are considered reliable by modern standards. He argued that the hill was constructed in steps, each tier being filled in with packed chalk, and then smoothed off or weathered into a slope. Others have identified a spiralling path climbing to the top and prefer to see the construction as being more incremental with the benefit of also providing a processional route to the summit.