Visited these and the nearby barrows and stone circle, and unless I'm particularly blind at the moment I couldn't see the broken stones. I may just have missed them or have they been removed or taken away for repair?
To find these from the Tregeseal stone circle, take the path from the SE corner of the circle that runs NE just skirting the S side of the southerly of the three cairns. The holed stones start a little beyond the cairn.
There are five stones. Three are in an alignment of four stones (one unholed) and these have been numbered 2,3,4 from E to W. Numbers 3 and 4 have fallen. Number 2 still stands and is the tallest of the five at 1.4m.
There are two outliers - stone number 1 lies 90m to NE of the alignment and is fairly easily spotted on the hill. Number 5 is easily seen 18m NW of 4.
1 and 5 have been repaired and are made of different stone from the other three.