Pebbles that have been used in this way, as pounders or mullers, belong to various ages and different degrees of civilization. Some well worn have been found in Yorkshire[933] barrows and elsewhere.[934] One from Philiphaugh,[935] Selkirkshire, has been figured. I have one such, worn into an almost cubical form, which was found with Roman remains at Poitiers, and I have seen several others said to be of Roman date. A pounding-stone of much the same form as Fig. 165, found on the summit of the Mont d’Or, Lyonnais,[936] has been engraved by M. Chantre, with others of the same character. I have seen examples in Germany. I have a flat granite pebble, about 3 1∕2 inches by 3 inches, the sides straight, the ends round, and with well-marked circular depressions in each face, from Cayuga County, New York. It has certainly been used as a hammer-stone. Such mullers are by no means uncommon in North America. Some of the American[937] stone discs, which are |245| occasionally pierced, appear to have been more probably used in certain games. Cup-shaped cavities occasionally occur on stones which have not apparently been intended for use as hammers. In the soil of one of the barrows at Rudstone, near Bridlington, Canon Greenwell found a fragment of a greenstone pebble, nearly flat on one face, in which a concave depression, about an inch over and 1∕4 inch deep, had been picked. In the National Museum at Edinburgh is a subquadrate flat piece of grit, 1 inch thick and about 3 1∕2 inches long, on each face of which is a cup-shaped depression about 1 1∕4 inches in diameter. It does not appear to have been used as a hammer. Mr. James Wyatt, F.G.S., had a piece of close-grained grit, in shape somewhat like a thick axe-head, 4 1∕2 inches long, 3 inches wide, and 3 inches thick, with four concave depressions, one on each face and side, found at Kempston Road, near Bedford. What purpose these hollows fulfilled, it is difficult to guess. The stones in which they occur may, however, have been used as anvils or mortars on which to hammer or pound; or the cavities may have served to steady objects of bone, stone, or wood in the process of manufacture. Anvil stones, with pits worn on their faces, probably by flints having been broken upon them, have been found in Scotland.[938] A sandstone[939] with a concave depression on each of its six faces has been regarded by Mortillet as a grindstone for fashioning stone buttons or the convex ends of other implements. I have seen analogous cavities produced, on a larger scale, on blocks of granite which have been used as anvils, on which to break road materials. The cup and ring cuttings[940] common on ancient stone monuments, especially in Scotland, do not come within my province. Flat stones, with cup-shaped markings upon them, sometimes as many as seven on a stone, were found in considerable abundance in some of the Yorkshire[941] barrows examined by Canon Greenwell.