The chief weapon of all Amerinds was the bow and arrow.[220] The bow was made in a number of ways and of various kinds of wood, and of horn, reinforced as a rule by a backing of sinew. The arrow-shaft was most frequently of service-berry wood when it could be had, and also of reed with a tip of some solid wood. The heads were of chipped stone, or bone, or latterly of bottle-glass, or often, for small-bird shooting, without any head whatever. A few heads were of copper, and in modern times hoop iron is used. Amongst all the Amerind bows that I have ever seen, one made from the horns of a mountain sheep, with a portion of the skull as the central part, was the finest and most graceful. It was exactly the shape of the typical bow wielded by the little god Cupid, and I have always regretted that I did not purchase it at the time, for I have never seen one since. I saw it in southern Utah in 1875.[221] I have sometimes thought that the bow and arrow were a development from the primitive fire-drill, through the bow-drill and spear. Some day by accident or design perhaps the drill stick sprung from the tightened string, the idea of substituting the spear for the drill stick was suggested, and the greatest invention in its effect on humanity man has yet seen was born. [Illustration: PAI UTE PALM-DRILL Drawn by the author from a specimen obtained by him in Arizona, 1875. Lower part of shaft of greasewood about 5 in. long and ⅜ in. diameter. Hearth of cedar (Juniper). Upper part of drill shaft is omitted. ]