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Published online by Cambridge University Press: 28 November 2017
The Radiocarbon dates were calibrated using the University of Washington Qaternary Research Centres computer programme CALIB, rev 3.0.1 (Stuiver & Reimer 1993). Dr J Ambers, British Museum Dept of Scientific Research helped arrange and interpret the dates for Sam -y-bryn-caled (sites 1 and 2) and Coed-y-Dinas (Site 3).