_Grooved Sinkers._ Some large thick pebbles have grooves pecked around their shortest circumference. They may have been used as canoe smashers or anchors, but seem more likely to be net sinkers. Two of these are shown in Figs. 14 and 15. They are from Priest Rapids and are in the collection of Mr. Mires. Both are battered along the lower edge, from the groove on the left to within a very short distance of it on the right and over a considerable portion of the edge of the top. In the second specimen, this battering forms a considerable groove on the lower edge, but a groove only the size of those shown in the illustration on the upper edge. This battering suggests that they may have been used as hammers, but the battered ends of hammers are not often grooved. There are certain grooves pecked on one side of each which seem to be of a decorative or ceremonial significance and are consequently discussed on p. 132 under the section devoted to art. The first specimen is made of granite or yellow quartzite with mica, the second is of granite or yellowish gray quartz with augite and feldspar. One specimen similar to these two, but without any decoration or grooving (202-8116) was found by us on the beach at Kennewick as was also a large pebble grooved nearly around the shortest circumference (202-8332) at Priest Rapids. One object of this type made of a boulder but grooved around the longest circumference was seen in Mr. Owen's collection. It was found on the bank of the Columbia River two miles below Pasco. The specimen described on p. 60 which has a notch pecked in each side edge and is battered slightly on one end may have been used as a net sinker, although it has been considered a hammer. This specimen (202-8214) in a way resembles the small flat notched sinkers except that the notch is pecked instead of chipped and that it is larger and thicker in proportion. Other specimens which are considered as net sinkers, anchors or "canoe smashers" instead of being grooved, are perforated by a hole which tapers from each side and has apparently been made by pecking. Sometimes this hole is in the center, while in other cases it passes through one end. Fig. 16 illustrates such a specimen. It was found at Priest Rapids and is in the collection of Mr. Mires. It is made from a river pebble of yellowish-gray volcanic rock. The perforation is in the broadest end. A similar specimen perforated near one end and one pierced near the middle were seen in Mr. Owen's collection. He believes that these were used for killing fish, an Indian having told him that such stones were thrown at the fish and retrieved with a cord which was tied through the hole. Probably all of these were sinkers for nets or at least anchors for the ends of nets, set lines or for small boats.