Drove up to the end of the tarmacced lane at SH641192 and then had a 15 minute walk N along the track at the edge of the forest, NW along a footpath through the forest and then S and E along forest tracks.
The stone 1.4m high, 0.46 m wide and 0.35m deep stands at the S side of the track. It is really well disguised amongst the trees around it and at first glance looks just like a tree stump with its covering of moss and vertical bands of grey and brown looking like bark.
I tried unsuccessfully to find the glacial erratic with the supposed sword imprint listed as Cerrig y Cledd (North) in the Megalithic Portal. I could see no sign of it in the relatively thin forest up to 100m north of the stone but did not venture into the denser forest further north.