34Macalister, R.A.S., E.C.R. Armstrong, and R.L.I. Praeger. "Report on the Exploration of Bronze-Age Carns on Carrowkeel Mountain, Co. Sligo." Proceedings of the Royal Irish Academy. Section C: Archaeology, Celtic Studies, History, Linguistics, Literature 29 (1911/1912): 340.
The rounded, marble-like stone balls are often found in passage tombs in close proximity to the human remains. Quoting C.F. Gordon Cummin, (In the Hebrides, p. 45) Wood-Martin wrote, "These pebbles were also found in most of the old tombs recently excavated in the neighbourhood of Dundee: in fact, so frequent was their presence that it was common for the workmen employed in excavating to exclaim: 'Here are the two stones! -- now we will get the bones."' (Wood-Martin, W.G., The Rude Stone Monuments of Ireland: Co. Sligo and Achill Island. Dublin: Hodges, Figges and Co., 1888. 87.)