Adelia shrugged. “I merely look at the end result. The Jews are blamed; a mob is fired into madness; Chaim, the biggest moneylender in Cambridge, is hanged. The tower holding the records of all those owing money to the usurers goes up in flames, Chaim’s with it.”

“He owed money to Chaim? Our killer having satisfied his perversion also wants his debt canceled?” Simon considered it. “But could he have reckoned on the mob burning the tower down? Or that it would turn on Chaim and hang him, for that matter?”

“He is in the crowd,” Mansur said, and his boy’s voice went into a shriek: “Kill the Jews. Kill Chaim. No more filthy usury. To the castle, people. Bring torches.”

Startled by the sound, the head of Ulf peeped over the rail of the gallery, a white and unruly dandelion clock in the growing darkness. Adelia shook a finger at it. “Go to bed.”

“Why you talking that foreign gobble?”

“So you can’t eavesdrop. Go to bed.”

More of Ulf appeared over the rail. “You reckon the Judes didn’t do for Peter and them after all, then?”

“No,” Adelia told him and added, because, after all, it was Ulf who had discovered and shown her the drain, “Peter was dead when they found him on the lawn. They were frightened and put him into the drain to take suspicion off themselves.”

“Mighty clever of ’em, weren’t it?” The boy gave a grunt of disgust. “Who did do for him, then?”

“We don’t know. Somebody who wanted to see Chaim blamed, perhaps someone who owed him money. Go to bed.”

Simon held up his hand to detain the boy. “We do not know who, my son. We try to find out.” To Adelia he said in Salernitan, “The child is intelligent; he has already been of use. Perhaps he can scout for us.”

“No.” She was surprised by her own vehemence.

“I can help.” Ulf left the balustrade to come pattering down the stairs in a rush. “I’m a tracker. I got my hoof all over this town.”

Gyltha came in to light the candles. “Ulf, you get to bed afore I feed you to the cats.”

“Tell ’em, Gran,” Ulf said desperately. “Tell how I’m a fine tracker. And I hear things, don’t I, Gran? I hear things nobody else don’t acause nobody don’t notice me, I can go places… I got a right, Gran, Harold and Peter was my friends.”

Gyltha’s eyes met Adelia’s and the momentary terror in them told Adelia that Gyltha knew what she knew: The killer would kill again.

A jackal is always a jackal.

Simon said, “Ulf could come with us tomorrow and show us where the three children were found.”

“That’s at the foot of the ring,” Gyltha objected. “I don’t want the boy near it.”

“We have Mansur with us. The killer is not on the hill, Gyltha, he is in town; from the town, the children were abducted.”

Gyltha looked toward Adelia, who nodded. Safer that Ulf should be in their company than wandering Cambridge following a trail of his own.

Gyltha considered. “What about the sick?”

“Surgery will be closed for the day,” Simon said firmly.

Equally firmly, Adelia said, “On his way to the hill, the doctor will call on yesterday’s worst cases. I want to make sure of the child with the cough. And the amputation needs his dressing changed.”

Simon sighed. “We should have set up as astrologers. Or lawyers. Something useless. I fear the spirit of Hippocrates has lain a yoke of duty across our shoulders.”

“It has.” In Adelia’s limited pantheon, Hippocrates ruled supreme.

Ulf was persuaded to the undercroft where he and the servants slept, Gyltha retired to the kitchen, and the three others resumed their discussion.

Simon drummed his fingers on the table, thinking. He stopped. “Mansur, my good, wise friend, I believe you are right, our killer was in the crowd a year ago, urging the death of Chaim. Doctor, you agree?”

“It could be so,” Adelia said cautiously. “Certainly Mistress Dina believes the mob was being set on with intent.”

Kill the Jews, she thought, the demand beloved of Roger of Acton. How fitting if that creature proved as horrid in action as in person.

She said so out loud, then doubted it. The children’s murderer was surely persuasive. She could not imagine the timorous Mary being tempted by Acton, however many sweetmeats he offered her. The man lacked guile; he was a ranting buffoon, ugly. Nor, despising the race as he did, was he likely to have borrowed from a Jew.

“Not necessarily so,” Simon told her. “I have seen men leave my father’s counting house, condemning his usury while their purses bulged with his gold. Nevertheless, the fellow wears worsted, and we must see if he was in Cambridge on the requisite dates.”

His spirits had risen; he would not be long returning to his family after all. “Au loup!” Beaming at their puzzlement, he said, “We are on the scent, my friends. We are Nimrods. Lord, if I had known the thrill of the chase, I would have neglected my studies for the hunting field. Tyer-hillaut! Is that not the call?”

Adelia said kindly, “I believe the English cry halloo and tallyho.”

“Do they? How quickly language corrupts. Ah, well. However, our quarry is in sight. Tomorrow I shall return to the castle and use this excellent organ”-he tapped his nose, which was twitching like a questing shrew’s-“to sniff out which man it is in this town that owed Chaim money he was reluctant to repay.”

“Not tomorrow,” Adelia said. “Tomorrow we go to Wandlebury Hill.” To search, it would need all three of them. And Ulf.

“The day after, then.” Simon was not to be put off. He raised his flagon first to Adelia, then Mansur. “We are on his track, my masters. A man of maturity in age, on Wandlebury Hill three nights ago, in Cambridge on such and such a day, a man in heavy debt to Chaim and leading the crowd as it bays for the moneylender’s blood. With access to black worsted.” He drank deep and wiped his mouth. “Almost we know the size of his boots.”

“Who may be someone entirely different,” Adelia said.

To that list she would have added a cloak of geniality, for surely if, like Peter, the children had gone willingly to meet their killer, they had been persuaded by charm, even humor.

She thought of the big tax collector.

Gyltha didn’t hold with her employers staying up too late and came in to clear the table while they were yet sitting at it.

“Here,” she said, “let’s have a look at that confit of yourn. I got Matilda B.’s uncle in the kitchen; he’s in the confectionary trade. Might be as he’s seen the like.”

It wouldn’t do in Salerno, Adelia thought, as she trudged upstairs. In her parents’ villa, her aunt made sure that servants not only knew their place but kept to it, speaking-and with respect-when spoken to.

On the other hand, she thought, which is preferable? Deference? Or collaboration?

She brought down the sweetmeat that had been entangled in Mary’s hair and put it with its square of linen on the table. Simon shrank from it. Matilda B.’s uncle poked at it with a finger like pasty and shook his head.

“Are you sure?” Adelia tipped a candle to give better light.

“It’s a jujube,” Mansur said.

“Made with sugar, I reckon,” the uncle said. “Too dear for my trade, we do sweeten with honey.”

“What did you say?” Adelia asked of Mansur.

“It’s a jujube. My mother made them, may Allah be pleased with her.”

“A jujube.” Adelia said. “Of course. They make them in the Arab quarter in Salerno. Oh, God…” She sank into a chair.

“What is it?” Simon was on his feet. “What?”

“It wasn’t Jew-Jews, it was jujubes.” She squeezed her eyes shut, hardly able to bear a renewal of the picture in which a little boy looked back before disappearing into the darkness of trees.

By the time she opened them, Gyltha had ushered Matilda B. and her uncle out of the room and then come back to it. Uncomprehending faces stared into hers.