¹³Listoghil (Carrowmore 51) is the only passage tomb in the Cüil Irra peninsula known to have had a covering mound of stone. According to Stefan Bergh, "The opinion that the boulder circles at Carrowmore originally were covered by caims does not withstand source critical assesment..." (Bergh, Stefan. Landscape of the Monuments: A Study of the Passage Tombs in the Cuil Irra Region. Riksantikvarieämbetet, 1995. 79-80.)