Lord Darcy did not move his eyes from those of the Benedictine. "I had assumed as much, Your Reverence," he said. "If it were a case of multiple personality, you would have detected it, eh?"
"I am certain I would have, my lord," Father Patrique stated positively. "If my lord of Cherbourg had been inhabited by another personality, I would have detected it, even if that other personality had been under cover." He paused, then waved a hand slightly. "You understand, Lord Darcy? Alternate personalities in a single human body, a single human brain, can hide themselves. The personality dominant at any given time conceals to the casual observer the fact that other—different—personalities are present. But the . . . the
alter egos
cannot conceal themselves from a true perceptive."
"I understand," Lord Darcy said.
"There was only one personality in the . . . the
person
, the
brain
, of the Marquis of Cherbourg at the time I examined him. And that personality was the personality of the Marquis himself."
"I see," Lord Darcy said thoughtfully. He did not doubt the priest's statement. He knew the reputation Father Patrique had among Healers. "How about drugs, Father?" he asked after a moment. "I understand that there are drugs which can alter a man's personality."
The Benedictine Healer smiled. "Certainly. Alcohol—the essence of wines and beers—will do it. There are others. Some have a temporary effect; others have no effect in single dosages—or, at least, no detectable effect—but have an accumulative effect if the drug is taken regularly. Oil of wormwood, for instance, is found in several of the more expensive liqueurs—in small quantity, of course. If you get drunk on such a liqueur, the effect is temporary and hardly distinguishable from that of alcohol alone. But if taken steadily, over a period of time, a definite personality change occurs."
Lord Darcy nodded thoughtfully, then looked at his sorcerer. "Master Sean, the phial, if you please."
The tubby little Irish sorcerer fished in a pocket with thumb and forefinger and brought forth a small stoppered glass phial a little over an inch long and half an inch in diameter. He handed it to the priest, who looked at it with curiosity. It was nearly filled with a dark amber fluid. In the fluid were little pieces of dark matter, rather like coarse-cut tobacco, which had settled to the bottom of the phial and filled perhaps a third of it.
"What is it?" Father Patrique asked.
Master Sean frowned. "That's what I'm not rightly sure of, Reverend Sir. I checked it to make certain there were no spells on it before I opened it. There weren't. So I unstoppered it and took a little whiff. Smells like brandy, with just faint overtones of something else. Naturally, I couldn't analyze it without having some notion of what it was. Without a specimen standard, I couldn't use Similarity analysis. Oh, I checked the brandy part, and that came out all right. The liquid is brandy. But I can't identify the little crumbs of stuff. His lordship had an idea that it might be a drug of some kind, and, since a Healer has all kinds of
materia medica
around, I thought perhaps we might be able to identify it."
"Certainly," the priest agreed. "I have a couple of ideas we might check right away. The fact that the material is steeped in brandy indicates either that the material decays easily or that the essence desired is soluble in brandy. That suggests several possibilities to my mind." He looked at Lord Darcy. "May I ask where you got it, my lord?"
Lord Darcy smiled. "I found it buried in a flowerpot."
Father Patrique, realizing that he had been burdened with all the information he was going to get, accepted Lord Darcy's statement with a slight shrug. "Very well, my lord; Master Sean and I will see if we can discover what this mysterious substance may be."
"Thank you, Father." Lord Darcy rose from his seat "Oh—one more thing. What do you know about Lord Seiger?"
"Very little. His lordship comes from Yorkshire . . . North Riding, if I'm not mistaken. He's been working with my lord of Cherbourg for the past several months—something to do with books, I believe. I know nothing of his family or anything like that, if that is what you mean."
"Not exactly," said Lord Darcy. "Are you his Confessor, Father? Or have you treated him as a Healer?"
The Benedictine raised his eyebrows. "No. Neither. Why?"
"Then I can ask you a question about his soul. What kind of man is he? What is the oddness I detect in him? What is it about him that frightens my lady the Marquise in spite of his impeccable behavior?" He noticed the hesitation in the priest's manner and went on before Father Patrique could answer. "This is not idle curiosity, Your Reverence. I am investigating a homicide."
The priest's eyes widened. "Not . . . ?" He stopped himself. "I see. Well, then. Granted, as a perceptive, I know certain things about Lord Seiger. He suffers from a grave illness of the soul. How these things come about, we do not know, but occasionally a person utterly lacks that part of the soul we call 'conscience,' at least insofar as it applies to certain acts. We cannot think that God would fail to provide such a thing; therefore theologists ascribe the lack to an act of the Devil at some time in the early life of the child—probably prenatally and, therefore, before baptism can protect the child. Lord Seiger is such a person. A psychopathic personality. Lord Seiger was born without an ability to distinguish between 'right' and 'wrong' as we know the terms. Such a person performs a given act or refrains from performing it only according to the expediency of the moment. Certain acts which you or I would look upon with abhorrence he may even look upon as pleasurable. Lord Seiger is—basically—a homicidal psychopath."
Lord Darcy said, "I thought as much." Then he added dryly, "He is, I presume, under restraint?"
"Oh, of course; of course!" The priest looked aghast that anyone should suggest otherwise. "Naturally such a person cannot be condemned because of a congenital deficiency, but neither can he be allowed to become a danger to society." He looked at Master Sean. "You know something of
Geas
Theory, Master Sean?"
"Something," Master Sean agreed. "Not my field, of course, but I've studied a little of the theory. The symbol manipulation's a little involved for me, I'm afraid. Psychic Algebra's as far as I ever got."
"Of course. Well, Lord Darcy, to put it in layman's terms, a powerful spell is placed upon the affected person—a
geas
, it's called—which forces him to limit his activities to those which are not dangerous to his fellow man. We cannot limit him too much, of course, for it would be sinful to deprive him entirely of his free will. His sexual morals, for instance, are his own—but he cannot use force. The extent of the
geas
depends upon the condition of the individual and the treatment given by the Healer who performed the work."
"It takes an extensive and powerful knowledge of sorcery, I take it?" Lord Darcy asked.
"Oh, yes. No Healer would even attempt it until he had taken his Th.D. and then specialized under an expert for a time. And there are not many Doctors of Thaumaturgy. Since Lord Seiger is a Yorkshireman, I would venture to guess that the work was done by His Grace the Archbishop of York—a most pious and powerful Healer. I, myself, would not think of attempting such an operation."
"You can, however, tell that such an operation has been performed?"
Father Patrique smiled. "As easily as a chirurgeon can tell if an abdominal operation has been performed."
"Can a
geas
be removed? Or partially removed?"
"Of course—by one equally as skilled and powerful. But I could detect that, too. It has not been done in Lord Seiger's case."
"Can you tell what channels of freedom he has been allowed?"
"No," said the priest. "That sort of thing depends upon the fine structure of the
geas
, which is difficult to observe without extensive analysis."
"Then," said Lord Darcy, "you cannot tell me whether or not there are circumstances in which his
geas
would permit him to kill? Such as, for instance . . . er . . . self-defense?"
"No," the priest admitted. "But I will say that it is rare indeed for even such a channel as self-defense to be left open for a psychopathic killer. The
geas
in such a case would necessarily leave the decision as to what constituted 'self-defense' up to the patient. A normal person knows when 'self-defense' requires killing one's enemy, rendering him unconscious, fleeing from him, giving him a sharp retort, or merely keeping quiet. But to a psychopathic killer, a simple insult may be construed as an attack which requires 'self-defense'—which would give him permission to kill. No Healer would leave such a decision in the hands of the patient" His face grew somber. "Certainly no sane man would leave that decision to the mind of a man like Lord Seiger."
"Then you consider him safe, Father?"
The Benedictine hesitated only a moment. "Yes. Yes, I do. I do not believe him capable of committing an antisocial act such as that. The Healer took pains to make sure that Lord Seiger would be protected from most of his fellow men, too. He is almost incapable of committing any offense against propriety; his behavior is impeccable at all times; he cannot insult anyone; he is almost incapable of defending himself physically except under the greatest provocation.
"I once watched him in a fencing bout with my lord the Marquis. Lord Seiger is an expert swordsman—much better than my lord the Marquis. The Marquis was utterly unable to score a touch upon Lord Seiger's person; Lord Seiger's defense was far too good.
But
—neither could Lord Seiger score a touch upon my lord. He couldn't even try. His brilliant swordsmanship is purely and completely defensive." He paused. "You are a swordsman yourself, my lord?" It was only half a question; the priest was fairly certain that a Duke's Investigator would be able to handle any and all weapons with confidence.
He was perfectly correct. Lord Darcy nodded without answering. To be able to wield a totally defensive sword required not only excellent—superlative—swordsmanship, but the kind of iron self-control that few men possessed. In Lord Seiger's case, of course, it could hardly be called
self-
control. The control had been imposed by another.
"Then you can understand," the priest continued, "why I say that I believe he can be trusted. If his Healer found it necessary to impose so many restrictions and protections, he would most certainly not have left any channel open for Lord Seiger to make any decision for himself as to when it would be proper to kill another."
"I understand, Father. Thank you for your information. I assure you it will remain confidential."
"Thank you, my lord. If there is nothing else . . . ?"
"Nothing for the moment, Reverend Father. Thank you again."
"A pleasure, Lord Darcy. And now, Master Sean, shall we go to my laboratory?"
An hour later, Lord Darcy was sitting in the guest room which Sir Gwiliam had shown him to the day before. He was puffing at his Bavarian pipe, filled with a blend of tobacco grown in the Southern Duchies of New England, his mind working at high speed, when Master Sean entered.
"My lord," said the tubby little sorcerer with a smile, "the good Father and I have identified the substance."
"Good!" Lord Darcy gestured toward a chair. "What was it?"
Master Sean sat down. "We were lucky, my lord. His Reverence
did
have a sample of the drug. As soon as we were able to establish a similarity between our sample and his, we identified it as a mushroom known as the Devil's Throne. The fungus is dried, minced, and steeped in brandy or other spirit. The liquid is then decanted off and the minced bits are thrown away—or, sometimes, steeped a second time. In large doses, the drugged spirit results in insanity, convulsions, and rapid death. In small doses, the preliminary stages are simply mild euphoria and light intoxication. But if taken regularly, the effect is cumulative—first, a manic, hallucinatory state, then delusions of persecution and violence."
Lord Darcy's eyes narrowed. "That fits. Thank you. Now there is one more problem. I want positive identification of that corpse. My Lord Bishop is not certain that it is his brother; that may just be wishful thinking. My Lady Marquise refuses to view the body, saying that it could not possibly be her husband—and that is
definitely
wishful thinking. But
I
must know for certain. Can you make a test?"
"I can take blood from the heart of the dead man and compare it with blood from My Lord Bishop's veins, my lord."
"Ah, yes. The Jacoby transfer method," said Lord Darcy.
"Not quite, my lord. The Jacoby transfer requires at least two hearts. It is dangerous to take blood from a living heart. But the test I have in mind is equally as valid."
"I thought blood tests were unreliable between siblings."
"Well, now, as to that, my lord," Master Sean said, "in theory there is a certain very low probability that brother and sister, children of the same parents, would show completely negative results. In other words, they would have zero similarity in that test.
"Blood similarity runs in a series of steps from zero to forty-six. In a parent-child relationship, the similarity is always exactly twenty-three—in other words, the child is always related half to one parent and half to the other.
"With siblings, though, we find variations. Identical twins, for instance, register a full forty-six-point similarity. Most siblings run much less, averaging twenty-three. There is a possibility of two brothers or two sisters having only one-point similarity, and, as I said, my lord, of a brother and sister having zero similarity. But the odds are on the order of one point seven nine million million to one against it. Considering the facial similarity of My Lord Bishop and My Lord Marquis, I would be willing to stake my reputation that the similarity would be substantially greater than zero—perhaps greater than twenty-three."
"Very well, Master Sean. You have not failed me yet; I do not anticipate that you ever will. Get me that data."