It is a relatively unusual arrangement, and what was found inside the smaller of the two circles makes it stranger still: the fragmentary remains of a child, interred in a cist, the kind of stone-lined grave box common in prehistoric Ireland, placed precisely at the point where the two circles meet.

The discovery was made and recorded by W. G. Wood-Martin, whose 1888 account described the circles in careful detail. The northern and larger ring measured roughly twenty feet across; the southern one about ten. The larger circle yielded nothing when examined, but within the smaller enclosure, close to where it adjoined its neighbour, traces of a rough cist survived. The bones recovered from it were passed to W. Frazer, a Fellow of the Royal College of Surgeons in Ireland, who analysed them with considerable precision. His conclusion was that almost all the remains belonged to a single child, most likely under seven years of age. The evidence was specific: the milk teeth had not yet been shed, and among the fragments Frazer catalogued were portions of ribs, two vertebrae, parts of the skull including a section of the temporal bone with its auditory process intact, along with finger and toe bones, forearm and leg bones, and parts of the pelvis. Two adult incisors and three adult molars were also present, though Frazer found no other evidence of grown interment. Everything was in a fragmentary state.

The deliberate placement of the cist at the junction of the two circles, where their edges meet, invites speculation about the significance of that liminal point within the monument's original design, though what precisely governed these decisions in prehistoric Sligo remains beyond what the physical evidence alone can confirm.