134 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 93 



have been exposed to considerable heat. With one exception, a piece of 

 fired limestone used as a hammer on the flat bottom, all are like the one 

 illustrated (pi. 17, fig. i, ;) except that they lack the definite finger 

 I)it on the upper edge. 



No large grinding stones or metates were encountered, but two 

 small polishing stones were noted. One of these, of sandstone, was 

 90 mm in length and was rough on one side and smooth on the other. 

 The smooth side had been used in grinding paint, as it was colored a 

 bright red. The other broken polishing stone was of granite with sharp 

 corners and two grinding surfaces. 



One partially ground celt came from cache 2 (pi. 17, fig. 2, d). 

 The butt end is broken, but the remaining portion is 83 mm long, 

 60 mm wide, and 37 mm in thickness. The material is a hard gray 

 stone, which is roughly chipped toward the butt, whereas the cutting 

 edge is smoothly polished and sharp. There is no trace of any groove. 

 No other polished celts were found. 



Although not classifiable as ground stone implements, it may be 

 noted here that many fragments of limestone, limonite, and other 

 mineral substances often showing the efTects of exposure to great heat 

 were encountered in this house. These were probably for use as tem- 

 pering materials, and the slaked lime and limonite would be usable 

 as a paint. Six small, irregular, polished pieces of red mineral, pre- 

 sumably hematite, may also have been used for paint. Unworked 

 boulders and pebbles of various sizes were encountered commonly in 

 the floor layer and in cache pits. 



Work in Chipped Stone 



The 19 arrowpoints from house 2 are of five types: NBa (10), 

 NBai (2), NBa4 (i), NBb (i), NBc (5). Like the points from 

 house I on Lost Creek, these also fall into two main divisions when 

 size is included as well as form. There is the heavy, triangular type 

 (pi. 7, fig. I, k, I) and the small, delicate, and commonly notched type 

 (pi. 7, fig. I, b, Ji). The former are usually of the gray " Nehawka " 

 flint, the latter of brown or yellow jasper. The sizes of the two types 

 are approximately the same as those from house i. Lost Creek, 

 although a few of the triangular, unnotched points from that site are 

 larger than the largest from Rock Blufl:'s, house 2. The form classifi- 

 cation of the house 2 points is given in table 3, where it can be com- 

 pared with that from other sites. 



End scrapers were rather numerous in house 2, 24 being recovered. 

 The finest and largest specimen (pi. 7, fig. 1, s) is 75 mm in length 



