²⁸Moore, Sam. Abbeyquarter North Passage Tomb, Co. Sligo Sl014-266 A Landscape Analysis (unpublished essay).
The author writes that Abbeyquarter's, "...possible 55 original boulders exceeds the number of any other boulder circle in the region, with Carrowmore 19 having the next largest number of 53 boulders. However, Carrowmore 19 has very large boulders that stand on edge while those of Abbeyquarter North are of smaller, more average size, and are not erected in the same commanding manner."