His shoes were marked with cross and spell:
Upon his breast a pentacle.
This symbol, says C. J. S. Thompson, in "The Mystery and Romance of Alchemy and Pharmacy," consisted of a five-rayed star, and was often chalked upon the door-steps of houses, to scare away fiends. Thus it served the same purpose as the familiar horse-shoe, when the latter was placed with the prongs downward.
The belief in the pentacle's demon-repelling power has been attributed to the fact that it resolves itself into three triangles, and is thus a triple emblem of the Trinity. Paracelsus, according to the above-mentioned writer, ascribed a similar, although less marked virtue, to the hexagram.
The Tyrolese physician, Joseph Ennemoser, in his "History of Magic" (1844), observed that in his time a peculiar influence was attributed by mesmerists to certain metals and precious stones. And he expressed the belief that the popular faith in talismans, prevalent in the early ages, originated through similar ideas. The Buddhists credited the sapphire with magical power. Probably the magnetic polarities of jewels, rather than their brilliancy, constitute their chief potency as talismans. Yet the latter quality doubtless strongly influences the imagination.
Talismans were formerly divided into three classes, astronomical, magical, and mixed.
The first-named consisted usually of a magical figure, cut or engraved under certain superstitious observances of the configuration of the heavens.
It has been defined as the seal, figure, character, or image of a heavenly sign, constellation, or planet, engraved on a sympathetic stone, or on a metal corresponding to the star, in order to receive its influences.[22:1]
Magical talismans were inscribed with mysterious symbols, words of superstitious import, and the names of unknown angels; they were well adapted to inspire with awe the minds of the ignorant. The so-called mixed talismans bore various unintelligible devices and barbaric names. Some of the most ancient protective and healing charms were fashioned out of roots, twigs, and plants. Whatever its form, the talisman was believed to exert an extraordinary influence over the bearer, especially in warding off disease or injury.
In its widest sense, the word talisman is synonymous with amulet.
The Dutch historian, Johann Busch (1400-1477), told of his meeting a woman, the wife or daughter of a soldier, on some public festal occasion at Halle in Prussian Saxony. Observing that she wore a little bag suspended from her neck, he asked her what it contained. Thereupon the woman showed him a bit of parchment bearing divers mystic inscriptions, and the statement that Pope Leo guaranteed the bearer thereof against bodily injuries, fainting spells, and drowning. Then followed the words, Christus vincit; Christus regnat, together with the names of the twelve apostles, and those of the three Wise Men, Balthasar, Melchior, and Kaspar.[23:1]