94Newman, Conor. Tara: An Archaeological Survey. Dublin: Royal Irish Academy for the Discovery Programme, 1997, pp. 53-9.

Newman writes, "Although there appear to have been no posts or post-casts recovered in the excavated area, the size and shape of this trench suggested to the excavator that it was the foundation trench for a stout wooden palisade which, he speculated, may once have formed a continuous stockade around the inside of the earthwork (Ó Ríordáin, 1961, 9). That this feature did indeed encircle the interior of the monument is now supported by geophysical prospection, which has revealed the existence of a narrow, linear feature, approximately 2m inside the edge of the fosse, at four different locations around the enclosure."