Hi Wolf -
That stone was first catalogued in John Hedges Rombald's Moor survey as stone 138, then in PRAWR as stone 298, with them asking, "perhaps recent?"
i thought it strange that there could be a rock with 3 cups on it so close to the Haystack and it not have its own site. What is the overall opinion?..more modern?.also i did notice chalk marks around one of the cups.