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374 longitudinally, but probably not to a sufficient extent to affect the flight of the arrow. This form is of common occurrence on the Yorkshire Wolds, though very variable in its proportions, and also in point of symmetry, both as regards outline and similarity of the two faces.

In Fig. 283 is shown another and broader form, from Butterwick, on the Yorkshire Wolds. It is in the same collection, and is worked on both faces. The sides are slightly ogival, so as to produce a sharper point.

Occasionally, instead of being sharply pointed, arrow-heads are more oval in form. An instance of this kind is given in Fig. 284, the original of which was found by Mr. Francis Galton, F.R.S., on the occasion of a visit with me to the camp of Little Solsbury Hill, near Bath. It is of flint that has become white with exposure, equally convex on the two faces, and rather thick in proportion to its size. I have a somewhat similar but broader specimen from the camp of Maiden Bower, near Dunstable, and others even more rounded at the point, and larger and thinner, from Willerby Wold, Yorkshire, and from Icklingham. I have one Yorkshire specimen, which is almost circular in form, and bears traces of grinding on one of its faces. In the Greenwell Collection are specimens of almost all intermediate proportions between an oval like Fig. 284 and a perfect circle.