Note 520 — Chapter IV
Reading edition
See B. C. A. Windle, Remains of the Prehist. Age, &c., pp. 232-47. Durham, strange to say, has hardly any, though they abound in Northumberland (W. Greenwell, Brit. Barrows, pp. 378, 440; Journ. Brit. Archaeol. Association, N. S., xi, 1905, p. 168). In highly cultivated districts many have of course been destroyed.