The lower slopes of Carningli are covered with traces of Bronze Age settlement (Pearson 2001) and so some features of the hillfort may be even older.

According to Hogg, there are signs that some of the defensive embankments and walls had been intentionally demolished, which he attributed as "evidence for systematic destruction by Roman invaders in the aftermath of the conquest of Wales".

[1] The Royal Commission on the Ancient and Historical Monuments of Wales noted in 2009 that "Such a dramatic interpretation, placing the Roman legions on the slopes of Carn-ingli in an attack on its inhabitants, might be questioned today".

The site is referred to in the Cadw Guide to Ancient and Historic Wales (1992) by Sian Rees, and in NP Figgis's "Prehistoric Preseli" (2001).

[3] Brian John's self-published "Angel Mountain Saga" of eight volumes, recounts the life of Mistress Martha Morgan of Plas Ingli.

There was once a little "mountain railway" on Carningli, carrying broken stone from a small quarry down to a crushing plant on the Cilgwyn Road.