[151] Described by Smith, (c), p. 415. [152] Spinden, p. 188. [153] Lewis, p. 186; Lewis and Clark, III, p. 124. A pebble, oval in outline and in cross section (202-8303), found on the surface of the bank of the Columbia River, near the head of Priest Rapids, is battered on one side edge near the middle in a way that suggests that the place was for the reception of the end of a handle. The lower edge is battered and the top has a large chip off of each side. It was probably used as a hammerstone. Another flat oval pebble of lava (202-8305) found at the same place, is chipped on both sides of the entire edge; but the edge is not sharp, apparently having been dulled by scraping, the natural sand blast or weathering. A disk or sub-oblong-shaped pebble (202-8304) also found at the same place is chipped from one side only across the entire edge at a slight bevel so that it has a nearly flat edge. The high places of the edge are smoothed as if from its use in pecking, yet it does not seem to have been much used for such a purpose or to need to have been chipped into disk form for that use. None of the pebbles which were notched and supposed to be net sinkers, as mentioned on p. 30 and that were found in this region, show battered ends or appear as if they had been used as hammers. On the other hand, some of the grooved pebbles described as net sinkers are battered, p. 30. It will be remembered[154] that no notched hammers or those grooved entirely around, like those found here, were found in the Thompson River region, although a pebble which had been notched or grooved on two edges was found and figured as a hammer.[155] Nor was the grooved stone maul used by the Nez Perce to the east according to Spinden[156] although many specimens are found on the Umatilla in northern Oregon to the south.[157] [154] Smith, (c), p. 415. [155] _Ibid._, Fig. 347. [156] Spinden, p. 188. [157] Lewis, p. 186; Lewis and Clark, III, p. 124. [Illustration: Fig. 44. Hammerstone made of a Close-Grained Yellow Volcanic Pebble. From Priest Rapids. 1/2 nat. size. (Drawn from photograph 44534, 8-2. Original in the collection of Mr. Mires.)] [Illustration: Fig. 45. Celt made of Serpentine. From an Indian at Ellensburg. 1/2 nat. size. (Drawn from photograph 44507, 6-8. Original in the collection of Mr. McCandless.)]