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136 drift, and some correspondence upon the subject appeared in the Times newspaper. The gravel, however, in which it was found seems to belong to the series of Glacial deposits, and if so, is of considerably greater antiquity than any of the old River-gravels, in which the unpolished flint implements have been discovered. This celt is of greenstone, carefully polished at the edge, and towards the butt slightly roughened by being picked with a sharp pointed tool. This roughening is in character similar to that which has been observed on many of the celts from the Swiss Lake-dwellings and from France, and was no doubt intended in their case to make the stone adhere more firmly in the socket of stag's horn in which it was inserted. The object in this case would appear to be the same; and, like other polished celts, it belongs to the Neolithic Period. The expansion of the blade towards the edge is very remarkable.

A celt of the same type as that from Malton, but somewhat oblique at the edge, and formed of quartz containing pyrites, found at Soden, is in the Museum at Bonn.

A flat form of stone hatchet, expanding rapidly from a slightly tapering butt about half the entire length of the blade, so as to form a semicircular cutting-edge, has been found in South Carolina. There is a small perforation in the centre, as if for a pin, to assist in securing it in its handle.

Another form, with the blade reduced for about half its length, so as to form a sort of tang, is engraved by Squier and Davis.

The celt engraved in Fig. 82 presents an abrupt shoulder on one side only, which, however, is in this case probably due to the form of the pebble from which it was made, a portion of which had split off along a line of natural cleavage. It is formed of a reddish, close-grained porphyritic rock, and is subquadrate in section at the butt. It was found at Mennithorpe, Yorkshire, and is in the Greenwell Collection. In the same collection is a thin celt of clay-slate, 4 inches long, of much the same form, but rounded at the shoulder. It was found at Ryedale, in the North Riding of Yorkshire.

Some of the shouldered implements may have been intended for use in the hand, without hafting. This appears to be the case with the greenstone celt shown in Fig. 83. It was found on Middleton Moor, Derbyshire, and was in the collection of the late Mr. J. F. Lucas. The shallow grooves at the sides seem intended to receive the fingers much in the same manner as the grooves in the handles of some of