²¹O’Driscoll, James. “Head for the Hills: Nucleated Hilltop Settlement in the Irish Bronze Age.” Journal of World Prehistory 36, 1–47 (2023). p. 17. https://doi.org/10.1007/s10963-023-09172-8
The author writes, "The deep peat deposits (over 0.7 m in depth in places) in the interior of the fort have almost certainly obscured our record of this settlement, which may be much more extensive."
Elsewhere he reports that his photogrammetry work didn't point out any possible structures in the fort's interior, but that the area had been cleared of scree and loose stones.