This is shown on Rocque’s 1741 map of Richmond Park, but was apparently destroyed by digging for gravel in 1834, when human remains were found. It was situated 600m to the east of Henry VIII’s mound.
Source: Royal Parks Noticeboard at King Henry VIII Mound (2006).
Luton Friends of the Earth have been lobbying against road proposals which would damage this monument. See: us.geocities.com/lufoe/LutonLocalPlanInquiryResponseFinalAug04.doc
It may well be significant that these were placed on a hill overlooking the Icknield Way, the ancient way through the Chilterns.
Saxons ‘used a Bronze Age barrow on the Downs for their dead, more than a hundred of them, probably the casualties from an unrecorded battle’ – G.R. Crosher, Along the Chiltern Ways (London: Cassell, 1973)