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| | Historic Ireland - henges essay |
 | | The bank may be as high as 3 metres, for example at Durrington Walls in Wiltshire, and the ditch may be as deep as 6 metres, as illustrated by excavation at Avebury, Wiltshire, by Gray between 1908 and 1922. |
 | | In the majority of henges the ditch is inside the bank but in the most famous henge, Stonehenge in Wiltshire, the 1.8 metre high bank was built inside the 2 metre deep ditch, although there is in addition a low counterscarp outside the ditch. |
 | | Atkinson, for example, estimated that it would require 900,000 man-hours to produce Durrington Walls although Startin reduced this figure to 500,000 and suggested a workforce of between 250 and 500. |
| www.ballynagarrick.net /historicireland/HI902.htm (3480 words) |
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