One of his legs was white, the other black.

The man on the bed beside him had been africano.

SEVENTY-EIGHT

While I swam in a sea of knowledge, I lived in a world of ignorance and fear. It was dangerous to display any sort of knowledge outside of the tight circle formed by Don Julio, Mateo, and myself. I learned this painful lesson from Don Julio, whom I am sad to say claims that I am the only friend he has ever had who incites him to violence.

The incident occurred when a woman Don Julio had treated died in a town a day's ride from the hacienda. I accompanied Don Julio to the woman's home, where she was being prepared for burial. The woman was not of a great age, about forty years old, which is about what I calculated Don Julio's own age to be. And she had appeared to be in good health immediately prior to her expiration.

To further complicate matters, she was a wealthy widow who had recently married a younger man, who had a reputation as a profligate and womanizer.

Upon arrival at the house, Don Julio sent all but the alcalde and her priest out of the death room and examined the body. He suspected arsenic poisoning because of the smell of bitter almonds from her mouth.

The priest announced that the woman had expired from sinfulness because she had married so soon after the death of her husband and to a man whom the Church frowned upon.

I laughed at the priest's prognosis. "People don't die from sin."

The next thing I knew I was nearly knocked across the room by a blow from Don Julio. "Young fool! What do you know about the mysterious workings of God?"

I realized my folly. This was the second time in my life that I had gotten into trouble for exposing medical knowledge.

"You are correct, padre, the woman died of her sins," Don Julio said, "in the sense that she brought into her own house the scoundrel who poisoned her. Like almost all poisons, it will be extremely hard to prove that he administered it. However, with the permission of the alcalde, and the blessing of the Church, I would like to lay a trap for the killer."

"What trap do you wish to lay, Don Julio?" the alcalde asked.

"The bloodguilt?"

Both men murmured with approval. I remained quiet, in ignorance and humility.

"If I could get the padre and your excellency to prepare the husband by sowing the seeds of his fear..."

When the two left the room to converse with the husband, Don Julio said, "We have to hurry."

He began to examine the body. "The palm of her hand has a cut, probably when she broke this cup in her pain." The cut was a jagged one, but there was little blood in it.

Pieces of the cup were on the table next to the bed and on the floor beside the bed. He examined the cup part, sniffing them.

"I suspect that the poison came in this cup."

"How will you prove it? What is bloodguilt?"

"Bloodguilt is an old wives' tale, but one that many people believe." He took a copper tube and a small, round copper ball out of his medical case. I had seen him put liquid in the ball and attach the tube in it for insertion in the back side of a person's body when he was applying medicine to that place. "When a person dies, for some strange and unknown reason, blood sinks to the lowest part of the body. As she is lying on her back, the blood will gather all along her back, behind her legs, and so forth."

"Why?"

He shrugged. "No one knows. Many doctors believe that it is part of a process in which the body is drawn toward the earth for its burial. As you know from the books in the library that you read with my permission—and those you read by stealth—there are more mysteries than answers in life."

"The sinking of the blood—that is bloodguilt?"

"No. Help me turn her a little." He took his dagger from his belt. "I'm going to draw blood."

He filled the ball with blood and inserted the tube, keeping the device upward so the liquid would not run out. Pulling back the woman's sleeve, he sat the device on her bare arm, keeping his finger over the end so the blood would not run out.

"Here, put your finger where mine is."

I traded places with him, keeping the end of the tube sealed while he pulled the sleeve down until the ball and tube were covered.

"When you remove your finger, blood from the hidden container will slowly flow into her palm. To someone just entering the room, it will appear that the wound to her hand is bleeding."

"Why would the wound bleed?"

"Many people believe wounds to a body will bleed if the person's killer comes close. When that happens, the killer is unveiled. That is the bloodguilt, the blood of the victim pointing to the killer."

"Is this true? Does the blood really flow?"

"It does when you arrange for it to flow, as we just did. I sent the fray and the alcalde out to arouse the husband's fears about the bloodguilt. It is time to call them back with the husband in tow. When the husband steps into the room, remove your finger and step back, and I will point out that the palm is bleeding."

A moment later the husband ran from the room in terror. The last I saw of him, he was babbling incoherently as the alcalde's men tied his hands behind him. I did not attend his hanging; I had seen enough death in my life.

On the way back to the hacienda, Don Julio instructed me on the proper way to deal with medicine with a priest.

"The medical lore of a priest is found in the Scriptures."

"Scriptures have medical information?"

"No. That is exactly my point. To most priests, a doctor does not heal—God does. And God is stingy about how many He saves. If a doctor saves too many, the suspicion may arise that he is in league with the devil. When you challenged the priest, you were right in your knowledge, but wrong in your wisdom. It is dangerous for any doctor to demonstrate too much medical knowledge or effect too many cures. When the doctor is a converso, as I am, and as others believe you are, familiars from the Inquisition may pull you from your bed in the middle of the night if you expose too much medical skill."

I apologized profusely to the don.

"The same approach must be taken in regard to your knowledge of indio healing herbs. The herbs are often more effective than any European medicine, but care must be taken not to arouse the ire of priests or jealous doctors."

Don Julio told me something that I found shocking: He sometimes proscribed remedies that he knew were nonsense—but appeased patients and priests.

"There is a concoction called mithradatium that has several dozen ingredients and is believed to be a cure-all for everything, including poison. One of the main ingredients is the flesh of a viper on the theory that a snake is immune to its own poison. I find the medicine not only a fraud, but often harmful. When I administer it, I do so in such a weak dose that it can do no harm.

"Our doctors have more knowledge of poisons that kill people than of drugs to cure illness. The fools will often ignore an indio remedy that has been known to cure and apply something that has no medicinal value. The viceroy himself and half the grand men in Spain have bezoar stones to put into their drinks because they believe that the stones are an antidote that absorbs poisons."

"Bezoar stones? I have not heard of this antidote," I said.

"They're stones found in the organs of dead animals. Men who plot the course of nations, kings who rule empires, often will not drink anything unless their bezoar stone has been placed in their cups."