The late Caroline Wickham Jones wrote in 2006: Four thousand years ago work began to erect the great earthen burial mounds that comprise the Bronze Age barrow cemetery at the Knowes of Trotty, in Harray, Orkney. There are at least 16 barrows - or graves - in two rows, nestling between the edge of the farmlands and the foot of the moorland. Many were raised upon natural mounds to enhance their prominence.
More:
https://web.archive.org/web/20070115102703/http://heritage.scotsman.com/places.cfm?id=1242462006 (archive link)
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