Mr. W. G. Black, in his "Folk-Medicine" (p. 170), remarks that many of the magic writings used as charms were nothing else than invocations of the Devil; and cites the case of a young woman living in Chelsea, England, who reposed confidence in a sealed paper, mystically inscribed, as a prophylactic against toothache. Having consented, at the request of her priest, to examine the writing, this is what she found: "Good Devil, cure her, and take her for your pains." This illustrates the somewhat trite proverb, "Where ignorance is bliss, 'twere folly to be wise," and is a proof of the wisdom of the popular belief that the inscription of a healing formula should not be seen by the wearer, inasmuch as its mystic words are ordinarily invocations of spiritual Beings, and are not therefore adapted for comprehension by the human intellect! The mere remembrance of some traditional event in the life of our Lord has been accounted of value in popular leech-craft, as in the following charm against ague, taken from a diary of the year 1751, and still used in Lincolnshire within recent times: "When Jesus came near Pilate, he trembled like a leaf, and the judge asked Him if He had the ague. He answered that He neither had the ague nor was He afraid; and whosoever bears these words in mind shall never fear the ague or anything else."[35:1] Eusebius of Cæsarea, in his Ecclesiastical History,[35:2] gives the text of two letters alleged to have formed a correspondence between our Lord and Abgar, King of Edessa. They were said to have been originally written in Aramaic or Syro-Chaldaic characters, and were discovered beneath a stone some eighty miles from Iconium, the modern Konieh, in Asia Minor, in the year 97, and afterwards lost. Regarded as authentic by some learned authorities, they were nevertheless rejected as apocryphal by a church council at Rome, during the pontificate of Gelasius I, in the year 494. According to Eusebius, King Abgar, who was afflicted with a grievous sickness, learning of the wonderful cures wrought by our Lord, wrote Him a letter begging Him to come to Edessa. And the Master, although not acceding to this request, wrote a reply to the king, promising to send one of His disciples to heal him. And in fulfilment of that promise, after His resurrection, Thomas the Apostle, by divine command, sent Thaddeus, one of the seventy disciples, to Abgar. Such is the popular tradition. Full particulars of the visit of Thaddeus, together with copies of the letters taken from a Book of Records preserved at Edessa, may be found in a work entitled, "Ancient Syriac Documents," edited by W. Cureton, D.D. Copies of these letters were used as charms by the early Christians, and for this purpose were placed upon their door-lintels; they were still to be seen within recent years in many a cottage of Shropshire and Devon, where they are valued as preservatives from fever.[36:1] In the opinion of not a few scholars