What makes the site genuinely puzzling is not the number of stones but the absence of any obvious pattern. Unlike stone circles or alignments, which follow legible prehistoric logic, these appear to have been placed with no particular system, save for one stone circle identified in Cullaun. The stones range from roughly 0.9 to 1.8 metres in height and are all of red sandstone or conglomerate. One of them, designated stone 5Z on a survey map, stands 1.07 metres high, rectangular in section, and orientated north to south along its long axis.

The site was formally recorded between 1934 and 1936 by the Inspector of National Monuments, who counted 221 stones still standing at that time, 173 in Timoney Hills and 48 in Cullaun. Even then the number had already been reduced; a later map published in the Archaeological Survey of Ikerrin by Stout in 1984 recorded 245 stones in total, of which 70 had been removed, along with five cairns that had also disappeared. The Inspector noted in 1936 that despite the losses, the remainder constituted "a most remarkable group." What complicates any straightforward reading of the site as prehistoric is its location within the landscaped estate of Timoney Park, associated with the Parker-Hutchinson family. That setting raises a genuine question about whether some or all of the stones were placed or arranged during the improvement of the estate rather than in antiquity, and that question has not been conclusively resolved.