The frequent occurrence of drilled and perforated stone and shell implements, tubes, pipes, etc., accounts for the finding of a variety of awls, or drills, made of flint and stone. Not only perforated shell-gorgets, stone tablets or guards, plummets, and the like relics, but also beads, bears’ teeth, and other pendants or personal ornaments of various kinds, have been found in the mounds. They correspond to some extent to a class of perforated shell and bone implements met with in the ancient cave deposits of France and England; and the flint awls or borers by which they were drilled have been recognised among the rarer objects of the neolithic period found in England, France, Denmark, and in the Swiss Lake-dwellings.[37] Figs. 11, 12 are good examples of two types of such tools in use by the ancient flint-workers of the Ohio Valley. Fig. 11 was found by its present owner, Mr. James Pierce, near Mayville, Kentucky. The square butt which forms the handle retains the natural shape of the block of yellow chert of which it is made, while the chipped surfaces of the blade show the dark grey colour of the core. Fig. 12 is a larger and ruder example of the flint drill, from the collection of Dr. Hill, of Cincinnati, probably designed to be attached to a wooden haft, and used for operations on a larger scale. A more carefully finished small flint-awl, with a neatly worked handle, but unfortunately broken at the point, was presented to me by Mr. Merrin, of Newark, who picked it up in a field in that vicinity. A drill of a different kind is shown in Fig. 13, also from the collection of Dr. Hill. [Illustration: FIG. 13.—Stone Drill, Cincinnati. FIG. 14.—Flint-Knife, Cincinnati.]