Many objects heretofore called drills are in my opinion hairpins and cloak-fasteners, even in early historic times. Blankets or cloaks draped over the shoulders, and joined together on the chest, had on the edge loops of buckskin. A decorated stick or long bone was run through these loops to hold the covering together. In prehistoric times it is not unlikely that long bone pins and flint so-called drills were used for this purpose. Many of the so-called drills are too irregular in the cross-section to have been of much service in the real drilling. And if one inspects specimens in which the drilling was incomplete, one will be surprised at the percentage of cores in the bottom of the holes. This is especially true in the Mississippi Valley and the South, where wild reeds and canes grow. I cannot believe that we have satisfactorily explained these drills. The generally accepted theory, indicated by the name we have given them, that they were used in drilling, seems to me to be incorrect. I conclude that more of them served as coat-fasteners, hairpins, and ornaments. [Illustration: FIG. 195. (S. 1–1.) Drills from Colorado sites. Materials: jasper and chalcedony. Collection of Luther A. Norland, La Jara, Colorado. ] One must not forget that both sexes of Indians wore their hair long and ornamented the locks with copper bands, narrow strips of bead-work, feathers, etc. Narrow beaded bands were popular among certain tribes, not only as hair ornaments, but were worn across the forehead, while ornamented tassels of various kinds hung down on either side, or behind. It must be remembered that long, slender shell pins, not unlike the long drills, were worn as hairpins. These could not by any possibility have served as drills, as they are too fragile. Shell hairpins were easier to make and, naturally, more common than those of flint or copper. The manufacture of the long, slender, drill-shaped objects was no more difficult than the making of fine flint implements, but it is my opinion that there was greater risk of breakage. Another class of perforators which will fall, on form, under the classification presented above, was frequently called “reamers.” Illustrations are presented of these in Figs. 198 and 203. Reamers apparently were used for different purposes from the long drills. No sensible man will conclude that they were both identical in purpose. A reamer would be more effective for punching holes in soft, thin substances and drilling shallow holes in wood. I suppose buckskin was perforated by the means of bone awls, although the smaller reamer might be used for such purposes. The shorter drills seem to me to be more suitable for drilling in stone than the longer ones.