They avouch that every element and different state of being has animals resembling those of another element; as there be fishes sometimes at sea resembling monks of late order in all their hoods and dresses; so as the Roman invention of good and bad demons, and guardian angels particularly assigned, is called by them an ignorant mistake, sprung only from this original. They call this reflex man a co-walker, every way like the man, as a twin brother and companion, haunting him as his shadow, as is oft seen and known among men (resembling the original), both before and after the original is dead; and was often seen of old to enter a house, by which the people knew that the person of that likeness was to visit them within a few days. This copy, echo, or living picture, goes at last to his own herd. It accompanied that person so long and frequently for ends best known to itself, whether to guard him from the secret assaults of some of its own folk, or only as a sportful ape to counterfeit all his actions. However, the stories of old witches prove beyond contradiction that all sorts of people, spirits which assume light airy bodies, or crazed bodies coacted by foreign spirits, seem to have some pleasure (at least to assuage some pain or melancholy) by frisking and capering like satyrs, or whistling and screeching (like unlucky birds) in their unhallowed synagogues and Sabbaths. If invited and earnestly required, these companions make themselves known and familiar to men; otherwise, being in a different state and element, they neither can nor will easily converse with them. They avouch that a heluo or great eater has a voracious elve to be his attender, called a joint-eater or just-halver, feeding on the pith and quintessence of what the man eats; and that, therefore, he continues lean like a hawk or heron, notwithstanding his devouring appetite; yet it would seem they convey that substance elsewhere, for these subterraneans eat but little in their dwellings, their food being exactly clean, and served up by pleasant children, like enchanted puppets.