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Ordnance Survey letters comprising correspondence between John O’Donovan (1806-1861) and other researchers employed on the survey and OS head office staff. OS Letters exist for 29

Royal Irish Academy

Objects (1197)
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A major programme of archaeological excavation commenced on 18 June 1962 at the passage tomb cemetery at Knowth, Co Meath. This research excavation continued on a seasonal basis fo

Royal Irish Academy

Objects (37)
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