From Camden’s Brittannia, 2nd Ed.
“W. Matfen is the seat of sir William Blacket, bart. and in an adjoining field is a circular mount with a cavity at top, and by it a stone nine feet high, three feet by one and a half thick, called the Stob stone.
In opening of other tumuli of stones have been found two kistvaens, or coffins of four stones set on edge with a bottom and cover, containing the ashes of the dead appearing in a white dust. It has since all been removed”
There’s certainly no large mound next to the Matfen stone nowadays.