⁴⁵O'Kelly, Michael J., and Claire O'Kelly. Newgrange: Archaeology, Art, and Legend. London: Thames and Hudson, 1982. 105.
About his decision, at the conclusion of his fieldwork in 1975, to leave much of the tomb unexcavated, O'Kelly wrote: "By 1975 the objectives originally outlined had been achieved and we felt it desirable that the remainder of the site should be left for future generations of archaeologists who, presumably, would have newer and better techniques and fuller knowledge at their disposal." (p. 67)