Again, magic may be wrought on a man sympathetically, not only through his clothes and severed parts of himself, but also through the impressions left by his body in sand or earth. In particular, it is a world-wide superstition that by injuring footprints you injure the feet that made them. Thus the natives of South-eastern Australia think that they can lame a man by placing sharp pieces of quartz, glass, bone, or charcoal in his footprints.
