Probably Medieval in origin, it marks the meeting point of the parishes of Farndale East, Rosedale West Side and Westerdale.
Close by the road North of the Lion Inn.
The monument includes a prehistoric standing stone and the associated buried deposits immediately around its base. The monument, which is Listed Grade II is sited on moorland beside the Castleton to Hutton-Le-Hole road where it is crossed by a trackway. It stands at the intersection of the parishes of Rosendale (sic - Rosedale) West, Farndale East and Westerdale. The Margery Bradley standing stone is considered to date to the Bronze Age and to be roughly contemporary with Flat Howe round barrow which lies about 240m to the south west and is the subject of a separate scheduling. The stone is a rough, undressed slab around 1m wide, 0.35m thick and standing 2.1m above the current ground surface. It is orientated so that its largest surfaces face east and west and not to line up with either the road or the trackway. At the top of the west face there are the carved initials `T.D.' which are thought to stand for Thomas Duncombe and to have been left in the 18th century as an estate boundary mark. Carved into the foot of the east face there is an Ordnance Survey benchmark.