From Bron-y-foel-isaf keep driving along the little lane through two gates then park and walk . It's a long walk for little stones but a great place . It may be easier to apprach from Cors-y-Gedol hall as a small lane goes all the way I think .The stone furthest west is about 2-3 feet tall and straight /flat on one side, Coflein suggests it might be the last stone of a destroyed circle. The slightly smaller stone 130paces east has no such suggestions made of it, it's just a small squarish standing stone looking down into the valley and off to the mountains, fantastic place!
The map just says cairn, and I think we found a cairn, well, it was a slight bump with several stones protruding, if it's where maps says a cairn is then it must be a cairn. But for some reason know it all smarty pants Coflein says it's a double cairn, whatever one of them is. It gives no more information at all, there is only one cairn, and even that one is easily ignored, as it is almost flush with the ground.
About this double cairn at Pont Scethin, I believe you have been grossly mislead, so I submit myself for employment at your soonest convenience, presumably when you have laid off your current, erm...fool?