Two summer lodges photographed[140] by us near Ellensburg which were mentioned on page 12 and the one seen below Union Gap down stream from Old Yakima, resemble those of the Thompson River region to the north. It will be remembered that mat covered tipis are found in the Nez Perce region to the east.[141] Lewis and Clark[142] mention but one buffalo skin lodge among the Nez Perce in 1806 and that was apparently reserved for special occasions, but a few years later this type of lodge had practically supplanted the mat lodge among that tribe and was in common use among all the interior Salish and Sahaptin tribes. The mat houses of the Yakima are mentioned by Gibbs in the Pacific Railroad Reports.[143] [140] Summer lodge, covered with cloth, Japanese matting and Indian matting July, 1903; East of Ellensburg. Museum negatives no. 44523, 8-1 from the southeast; no. 44524, 8-2, from the west; and no. 44525, 8-3 a nearer view; and summer lodge covered with cloth, July 1903, in the northern part of Ellensburg, Museum negative no. 44526, 8-4 from the east. [141] Spinden, Fig. 6, Plate X. [142] Lewis and Clark, V, p. 16. [143] Gibbs, (a), I, p. 407. A pile of stones shown in Fig. 2, Plate V[144] and mentioned on p. 20 as uncovered by the wash of the flood waters of the Columbia, was seen on the bottom-lands on the western side of the Columbia, south of Sentinal Bluffs and within a hundred feet north of the house of Mr. Britain Everette Craig. It is possible that this may have been a house hearth or ancient cooking place, although the presence of human bones among these stones, suggests that it was a grave covered with flat oval river pebbles. Near by, uncovered by the same wash, was a small patch of fresh water unio shells shown from the west of south in Fig. 1, Plate V.[145] This was probably kitchen refuse. The little pits, each encircled with a slight embankment made up of the soil thrown out in making it, p. 15, are probably the remains of food caches near the houses. [144] Museum negative no. 44530, 8-8 from the southwest. [145] Museum negative no. 44531, 8-9 from the west of south. TOOLS USED BY MEN. A number of objects which seem to be tools intended to be used by men are found in this region. Among these may be mentioned a wedge, hammerstones, a celt, a hand-adze, drills, scrapers, and an arrow-shaft smoother.