Pre-Columbian copper in the ruins of the Southwest occurs chiefly in the form of bells, numerous examples of which have been illustrated in the literature. Generally these are of the “hawk's” or “sleigh” bell type, characterized by a spherical or pear-shaped resonator, free clapper, and an eyelet for suspension. In diameter they range from about 10 to 40 millimeters and, on the whole, are devoid of any ornamental features. Exceptions to this, of course, have been found,’ notably a few small bells with “wire work,” the effigy bell noted by Fewkes, and the large Delgar Ruin bell described by Hough. Since the larger examples are apt to display complicated technical and ornamental treatments, more can be done with these than with the small bells by way of pinning down their origins to centers where the metallurgist's art flourished.