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This report presents a summary account of two surveys undertaken by the authors to determine and interpret the alignments of the western and eastern passage tombs at Knowth, Co. Meath. The findings indicate that contrary to earlier suggestions, the eastern passage and the western passage (inner and outer) are not aligned towards sunrise and sunset respectively at the period of the vernal and autumnal equinoxes.
F. Prendergast and T. Ray (forthcoming, 2015), ‘Alignment of the Western and Eastern passage tombs at Knowth Tomb 1’, Appendix 2 in G. Eogan and K. Cleary (Archaeological Editor), Excavations at Knowth 6: The Great Mound at Knowth (Tomb 1) and its passage tomb archaeology. Dublin: Royal Irish Academy.