Note 476 — Chapter III
Reading edition
W. C. Borlase, Dolmens of Ireland, ii, 516-7, 549, 563; Rev. de l’École d’anthr., xv, 1905, pp. 213-4. The rarity of long barrows may partly be explained by supposing that a certain proportion of the others belonged to the late Neolithic Age. That some did is certain. See Proc. Soc. Ant. Scot., xxxvi, 1902, pp. 159, 171, and pp. 408-9, infra.