British flakes with ground edges are by no means common. One from Yorkshire, in my own collection, is a thin, flat, external flake, having both edges (which are parallel) ground from both faces to an angle of about 60°. It has, unfortunately, been broken square across, about 2 inches from the butt-end, and is 1 inch wide at the fracture. Another, from Bridlington, is an ovate flat external flake, produced, not by art, but by natural fracture, and having one side brought to a sharp edge by grinding on both faces. With the exception of its being partially chipped into shape at both ends, this grinding is all that has been done to convert a mere splinter of flint into a serviceable tool. It is an interesting example of the selection of a natural form, where adapted for a particular purpose, in preference to making the whole implement by hand. The small celt, Fig. 31, affords an analogous instance. In the Greenwell Collection are also two or three very rude flakes from the Yorkshire Wolds, which are ground at some portion of their edges. In a barrow on Seamer Moor, Yorkshire, the late Lord Londesborough[1302] found, with other relics, a delicate knife made from a flake of flint, 4 1∕4 inches long, and dexterously ground. A trimmed flake, like Fig. 239, some small celts, and delicate lozenge-shaped arrow-heads, like Fig. 276, were also present. The whole are now in the British Museum. A flake, from Charleston, in the East Riding, presented to me by Canon Greenwell, is shown in Fig. 196. It is of thin triangular section, slightly bowed longitudinally, having one edge, which appears to have |291| been originally blunt, sharpened by secondary working. The other edge has been sharpened to an angle of about 45° by grinding both on the inner and outer faces of the flake. The point, which is irregular in shape, is rounded over either by friction or by grinding. It seems well adapted for use as a knife when held between the ball of the thumb and the end of the first finger, without the intervention of any handle. [Illustration: Fig. 196.—Charleston. 1∕2] Another specimen, 4 inches long, ground to a sharp edge along one side, was in the collection of the late Mr. J. W. Flower, F.G.S., and is now in mine. It was found near Thetford. Mr. Flower had also a flake from High Street, near Chislet, Kent, with both edges completely blunted by grinding, perhaps in scraping stone. I have two trimmed flakes with the edges carefully ground, from the neighbourhood of Icklingham, Suffolk, and another ridged flake, 2 3∕8 inches long, pointed at one end and rounded at the other, one side of which has been carefully ground at the edge. I found it in a field of my own, in the parish of Abbot’s Langley, Herts. Canon Greenwell obtained another 2 1∕2 inches long, ground on both edges, from Mildenhall Fen.