Short cross-dykes are found on ridges or more rarely in valley bottoms. Their essential characteristics are that they run across a narrow strip of open ground, their ends resting on obstacles which in primitive times would have been naturally impassable :— in the case of cross-ridge dykes from scarp to scarp or scarp to forest, and of cross-valley dykes across the hard gravelly bottoms between impenetrable woods. In every case that I have seen they cross the line of a primitive road.
1 Earthworks of Cranborne Chase, p. 62 et seq.
2 ‘Covered Ways on the Sussex Downs’, Sussex Arch. Collections 1918, 59, 35–75.Google Scholar
3 There is just such a shallow pit at the southern end of Grim’s Bank on Little Heath, northwest of Silchester, 70 yards north of the Roman road leading to Speen. —EDITOR.
4 Caesar, B.G. II, viii.
5 Covered Ways on the Sussex Downs, pp. 63 et seq.
6 ANTIQUITY, March 1930, p. 97.
7 Mortimer, J.R. Forty years Researches, 1905.Google Scholar
* Two cross-valley dykes of this type have recently been noted in Hampshire.
8 Archaeology of the Cambridge Region, p. 127.
9 Covered Ways, pp. 62 et seq.
10 Sussex Archaeological Collections 1920, vol.61, 20–30.Google Scholar [These will appear on the forthcoming revised edition of the 6-inch Ordnance Map.— EDITOR].