The King's extreme decrepitude for a young man had several years before given rise to rumours amongst the vulgar that he was bewitched, and the assertion had been made the subject of grave consideration by the Grand Inquisitor of the time, who reported that he could find no evidence to act upon. At the time of the first serious illness of the King, in 1697, he had of his own action sent to the new Grand Inquisitor a terrible and austere Dominican monk called Rocaberti, and had confessed to him his conviction that his illness was not natural but the result of some maleficent charm, and besought him earnestly to have an exhaustive inquiry made. The Inquisitor told him that he would, if he pleased, have inquiry made, but saw no possible result could come of it, unless the King could point out some person whom he suspected or some plausible evidence to go upon. And so the matter remained until some weeks after Father Froilan had become confessor. As may be supposed, Froilan Diaz's elevation had reminded all his old friends of his existence, and, amongst others, an old fellow-student visited him, with whom he fell into talk about past days and former acquaintances. "And how is Father Argüelles getting on?" said the confessor. "Ah, poor fellow!" was the reply; "he is confessor at a convent at Cangas, terribly ill, but in no-wise cast down, for the Devil himself has assured him in person that God is preserving him for a great work yet that shall resound through the world." The King's confessor pricked up his ears at this, and wanted further particulars. It appeared, according to the friend, that Argüelles had had much trouble with two nuns of his convent, who were possessed, and in the course of his exorcisms had become quite on intimate terms with his Satanic Majesty. Froilan thought this was too important to be neglected, so he consulted the Grand Inquisitor, the Dominican Rocaberti. The grim monk did not, apparently, much like the business, but consented to a letter being written to the Bishop of Oviedo, the superior of Argüelles, asking him to question his subordinate as to the truth of the assertion that the King was suffering from diabolical charms. The Bishop, determined that he would not be made the channel for such nonsense, wrote a sensible answer back, saying that he did not believe in the witchcraft story. All that ailed the King was a weakness of the heart and a too ready acquiescence in the Queen's wishes, so he would have nothing to do with it.

Then Froilan sent direct to Argüelles, who himself was afraid of the business unless he was secured from harm, and refused to put any questions to the Devil unless he had the warrant of the Grand Inquisitor. A letter was therefore written by the latter on June 18, 1698, ordering him to write the names of the King and Queen on a sheet of paper, and, without uttering them, to place the paper on his breast, summon the Devil, and ask him whether the persons whose names were so written were suffering from witchcraft. Froilan sent the letter in a long one of his own to his old friend Argüelles with an elaborate cipher and other devices for secrecy in subsequent communications. No names henceforward were to be written. The vicar, Argüelles, replied, expressing no surprise at so strange a request, but said the Devil had previously told him that he was reserved for great things, but had not given particulars, only that he should receive an order from a superior. Then he tells the result obtained by his first effort. He says he placed the hands of the possessed nun upon the altar, and by the power of his incantations commanded the Devil to answer the question put to him. The Devil was not at all shy, but "swore by God Almighty that it was the truth that the King was bewitched," "et hoc ad destruendam materiam generationis in Rege et eum incapacem ponendum ad regnum administrandum." He said the charm had been administered by moonlight when the King was fourteen years of age.

So far the Devil. Then the vicar, as an expert, gives some advice of his own. He says the King should be given half a pint of oil to drink, fasting, with the benediction, and the ceremony of exorcism which the Church prescribes.[[7]] He must not eat anything for some time afterwards, and everything he eats and drinks must be blessed. The case is a very bad one, he says, and a miracle will be performed. If the King can bear it he should be given, in addition, the charm prescribed by the Church, but not otherwise.

He gives the not improbable opinion that as the King will vomit dreadfully he must be held in the arms of the "master," by which name it was agreed that the Grand Inquisitor should be referred to in the correspondence. But he says not an hour is to be lost, and the master himself must administer the draught.

But this remedy was too strong, and Froilan and the Inquisitor, or the friend and the master, as they are called henceforward, write to say that, although they are much obliged to the Devil and the vicar, such a draught as that recommended would certainly kill the King, and they beg the exorciser to ask the Devil again for a more practical and a safer remedy. "How much and in what form is the Church charm to be given; at what hour; on what parts of the body?" And so on—queer questions indeed to be addressed by two pillars of the Church to the Devil. But this is not all. They draw up a series of questions that would do honour to a cross-examining barrister. "What is the proof of witchcraft? In what way does it act so as to make the King do things contrary to his own will? How are the organs affected cleansed by the charm? What compact was made with the Devil when the witchery was effected? Was it administered internally, or externally? Who administered it? Has it been repeated? Is the Queen included in its operation?" And other questions of a similar sort. The vicar is rather shocked at their inquisitiveness, and refuses to put such questions. How can he ask the Devil anything that the Church does not deal with in its exorcising ceremonies?

Another letter is sent asking him to consult the Devil as to whether it will be well to take the King to Toledo, to which the vicar replies somewhat evasively, reproaching his associates. What is the good, he says, of all their professed desire to heal the King whilst they refuse to carry out the directions sent them? A change of place is useless if he takes the malady with him, and until they follow out the instructions already given it is no good for him to consult the Devil again. "Besides," he says, getting into dangerously deep water for a country vicar, "how can you expect the King to be well? Justice is not done, the churches are starved, hospitals are despoiled and closed, and souls are allowed to suffer in purgatory because money is begrudged for Masses, and above all, the King does not administer justice after swearing on the cross that he would do so. The Divine message has already been delivered to you. I have told you all it is fitting for you to know and how to cure the patient, and you do nothing but ask a lot more questions. I tell ye, then, that you will find no excuse for this at the supreme judgment, and the death of the King will be laid at your door, since you could cure him and will not." This was almost too bold to be borne, and the Inquisitor's secretary writes back in grave condemnation. He again insists upon the questions being put to the Devil. "You are presumptuous to dare to suppose that you know better than the friend and the master, and that you can command in this way whilst refusing to obey. You want to get out of it now by attributing the King's illness to other causes. The 'friend and the master' are deeply offended, and if you do not do as you are commanded all will be frustrated, and we distressed to feel that, just as God had begun to open the door of knowledge to us, all is spoilt by your presumption and obstinacy."

After a good deal more of mutual recrimination the vicar gave way, and on September 9, 1698, he wrote that he had sworn the Devil on the holy sacrament, and he had declared that the charm had been administered to the King in a cup of chocolate on April 3, 1673. "I asked," he writes, "what the charm was made of, and he said three parts of a dead man." "What parts?" "Brain to take away his will, intestines to spoil his health, and kidney to ruin his virility." "Can we burn any sign to restore him?" "No, by the God that made you and me." "Was it a man or a woman who administered the charm?" "A woman; and she has already been judged." "Why did she do it?" "In order to reign." "When?" "In the day of Don Juan of Austria, whom she killed with a similar charm, only stronger."

This of course was directed against the late Queen-mother—a dangerous line to take, considering that the Cardinal Archbishop Portocarrero, whose creature Froilan was, had been her friend and minister. Lucifer continued, that the remedies were those that the Church prescribed. First, drinking of blessed oil fasting; secondly, anointing the whole body with the oil; next, strong purges and absolute isolation of the King even from the sight of the Queen. Then the Devil got sulky, said he was tired and knew no more, and refused to say another word. The adoption of such a course as that prescribed, with a man who was dying already of exhaustion would have been murder; and of course the associates again hesitated, writing to the vicar directing him to inquire of the Devil if any witchery has been practised since the first, and why the King cannot do right when he wishes to, instead of being, as he complains, impelled to act wrongly against his will. It seems impossible that this can be the result of the original charm, particularly as the person who gave it is dead. Has anything been given since? "Yes," says the Devil, "in 1694, only four years ago, on September 24th, a similar charm was given in food and left no outward sign," and this the Devil swears by God and the Holy Trinity. Then Lucifer, tired of answering questions, apparently gives a bit of advice. He says they are thwarting Providence by their delay, and if they do not hurry up the King will be past help.

But again the friend and the master want more information, and on October 22nd write to say that it is of the highest importance that they should know the name and residence of the witch; who ordered her to act, and why. This the Devil absolutely refuses to answer; but as his past proceedings proved him to be a demon somewhat infirm of purpose, they do not seem to have been at all discouraged, but a week or so afterwards return to the charge with a perfect catechism, which they order the vicar to put to his diabolical interlocutor. "Who was the witch? What was her name, condition, and residence? Who ordered the charm, and why? Who got the corpse and prepared the conjuration? Who handed the chocolate to the King? Had the witch any children?" And so on at great length. The answer came from the vicar on October 7th, in which the Devil seems to have made quite a clean breast of it. The Queen-mother, he said, had ordered the first charm; the first witch was a woman named Casilda, married, with two sons, who lived away from her. The go-between was Valenzuela (the Queen-mother's favourite), and the witch had no accomplice but the Devil. She sought the corpse and prepared the charm, and handed it to Valenzuela. The second charm, in 1694, was administered by one who wishes for the fleur-de-lis in Spain; one who is a great adulator of the King, but hates him bitterly. The Devil could not mention names, he said, but they knew the person well. This witch was a famous one named Maria, living in the Calle Mayor; but he could not give the number of the house or her surname.

The Grand Inquisitor's secretary wrote in answer to this, thanking him, but regretting that his information was so limited. The street mentioned as the residence of the first witch, namely, the Calle de Herreros, did not exist in Madrid, and the friend and the master beg the vicar to ask his friend the Devil for more information as to the houses and husbands of both witches, "as to seek a Maria in the High Street of Madrid was like looking for a needle in a haystack." They want also the name of the person who ordered the second charm, and the secretary ends his letter with an astounding invocation of the Devil's aid. He is conjured in the names of God, of His holy Mother, and of St. Simeon of Jerusalem, the King's patron saint, to intercede with God, "who, the lessons tell us, is a relative," to aid in the King's recovery. No reply appears to have been received to this letter, but it was soon followed by another, saying that the friend and the master have administered the charm recommended by the Devil, and the King is better; but they urgently beg for further aid from the same quarter, and more charms if possible. This letter was written on November 5, 1698, and produced two replies from the vicar, who said that he had been conjuring all the afternoon fruitlessly, and at last the Devil burst out in a rage, "Go away! don't bother me." In fact, it is quite clear at this point that the vicar, having got himself into a perfect net of confusion and contradiction, was getting very frightened indeed; and his next letter said the Devil was sulky, and would only reply to all his conjurations that he, the Devil, had been telling him a lot of lies and would say no more. All would be known by and by, but not yet. The vicar added to this a remark to the effect that all the King's doctors were false and disloyal, and should be dismissed; the doctor to be appointed in their place was to be chosen more for his attachment to the old Church than for his medical science, and, in the meanwhile, the King's abode and garments were to be changed and the exorcisms continued.