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96 has been rendered blunt by grinding. The sides are very minutely chipped along the angles, and there seems some possibility of the instrument having been used as a rimer or boring tool.

The celts of other materials than flint, and ground only at the edge, are of rarer occurrence than those in flint. That engraved as Fig. 41 was found at Grindale, near Bridlington. It is of felstone, and is remarkable as being so much curved in the direction of its length. I have another smaller specimen from the same place, but the blade is straight. The edge, however, is slightly gouge-like.

Mr. J. W. Brooke has a small adze of flint (2 inches) in outline almost identical with Fig. 41. It came from near Aldbourne, Wilts. Another of these instruments expanding towards the edge, and apparently adapted for insertion in a socket, is shown in Fig. 42. It is made of hone-stone, and the flat butt is the result of a natural joint in the stone. It was found at North Burton, in the East Riding of Yorkshire, and is in the Greenwell Collection, where is also a celt of greenstone much like Fig. 41, found in a barrow with a burnt interment on Seamer Moor, Yorkshire; and another of the same class, 3 inches long and 2 inches wide, also from Seamer Moor. A third specimen, rather smaller, was found in a barrow at Uncleby, Yorkshire. One of greenstone, 2 inches long, and nearly triangular in outline, was found near Keswick, and is in the Blackmore Museum. A longer adze of greenstone, considerably curved in the blade, lay in company with various implements of flint in some sand-beds near York. In the Mayer Collection at Liverpool is a celt of clay-slate, 4 inches long and ground at the edge, found at Toxteth. In the collection of the late Mr. J. F. Lucas, of Fenny Bentley Hall, near Ashbourne, were two celts (5 and 7 inches) of the same type as Fig. 35, but more adze-like in character, and formed of felstone. They were found on Middleton Moor, and at Wormhill, near Buxton, Derbyshire.

In my own collection, is a greenstone celt with the sides sharp and nearly parallel, 7 inches long and nearly 3 inches broad, with a semi-circular edge partly ground, found at Shrub Hill, Feltwell, Norfolk.