³De Valéra, Ruaidhrí, and Séan Ó Nualláin. "The Megalithic Tombs of the Island of Achill." The Journal of the Royal Society of Antiquaries of Ireland 80.2 (1950): 205.
The authors explain: "The sites actually located by us lie within a confined [arable] area about 1 mile square in the townlands of Keel East, Doogort West and Bal of Dookinelly, placed centrally within the zone. This seems to be a favoured area, being the most productive at present. However, the ruined village of Slievemore, to the west, and the settlement of Doogort to the east, rather complicate the picture. The very intensive occupation of Slievemore during the past century could account for the absence of tombs due to destruction."