The man showed no surprise at our strange “tokens.” Bowing slightly, he said, “Thank you. This way,” and held a gloved hand out to indicate the elevator.

He didn’t ask Jules for a token, I thought, as the doorman pressed the button for the top floor. I studied him more closely and realized with surprise that he was a revenant. But my shock wasn’t because Mr. Gold had hired kindred to guard his building—it was because I had actually been able to tell what he was.

The weird special effects I had noticed around the numa were reversed in this man’s case. The inch of space around him was packed with more vibrancy and color than the rest of the air, whereas numa sucked the color out of their surroundings, leaving them with a colorless penumbra.

I glanced at Jules. He had the same vivid nimbus around his body. I had spent so much time with him and the others that I just didn’t notice it with them. Now that I was a part of the revenants’ world and was aware that supernatural beings existed where I never would have expected them before, I was paying more attention to who was human and who was not. In the case of the doorman . . . not.

He’s one of us, Vincent said, confirming my deduction.

We got off the elevator, followed the man down the hallway, and stopped in front of a door. He unlocked it and ushered us into an apartment. “Mr. Gold will be right here. He asks that you make yourselves comfortable.” And with that he closed the door, leaving us to examine our surroundings in awe.

The apartment was massive and modern, all white walls and hardwood floors with floor-to-ceiling windows and barely any furniture. Stone pedestals held ancient pottery and metal objects: A Greek mask in gold. A bronze Roman helmet. A finely sculpted marble hand the size of a refrigerator. I had seen things like this in museums, protected under heavy glass. But here they were within arm’s reach, tastefully arranged under gallery lighting that made them glow like jewels.

Papy’s sharp intake of breath indicated that he was just as impressed as I was. Even Jules straightened a bit as he took his hands out of his pockets and went up to touch the exquisitely carved marble shoulder of a nymph. Bran just stood gawking with his regular astounded look, his magnified eyes taking in every inch of the room.

The door opened again, and in stepped a young blond-haired, blue-eyed man in a white suit. He bowed slightly. “Theodore Gold,” he said.

“But you’re the doorman!” I exclaimed. He was barely recognizable without the uniform and hat. The perfect disguise, I thought. No one looks a doorman in the face.

“Yes, I’m sorry about that,” the man said with upper-class, posh-sounding diction that sounded nothing like the strong Jersey accent he had assumed as the doorman. “I value my privacy, and prefer not to depend on others for security. I would rather screen my own guests than risk the outcome of someone else’s error. Although you had a revenant with you”—he nodded toward Jules—“he could have been brought here under duress, used as a hostage if you wanted to get to me.”

“I take it you are Jules,” he said, greeting him with European cheek-kisses. “Welcome, kindred.”

“I’m Kate,” I said, and held out my hand for an American-to-American shake. Mr. Gold gave me a warm smile, and to my relief didn’t ask for a clarification of why I was there. I didn’t really feel like launching into an I’m-the-wandering-soul’s-girlfriend conversation.

Bran was next. “Your tattoo tells me that you are the healer Jean-Baptiste spoke of. I have read of your kind. It is truly an honor to meet you.”

He turned to my grandfather. “You must be Monsieur Mercier. Gaspard phoned to inform me of your—and your granddaughter’s—connection to the Paris kindred.” So, he knew.

That’s one less thing to explain, Vincent said to me.

“You read my mind,” I whispered back.

“I am Antoine Mercier,” my grandfather confirmed in his beautifully accented English. He peered at the revenant with a mixture of suspicion and curiosity. “But are you Theodore Gold IV? The Theodore Gold? Author of The Fall of Byzantium?”

The man smiled. “Yes, that was my work.”

Judging from Papy’s expression, he might as well have just met the pope. “But you are so young! I am in awe that I am actually meeting you. Your grandfather’s book on Roman-era pottery is like my own personal bible.”

Amusement flashed across Theodore Gold’s face. “Actually, Theodore Gold Junior was also me. As was Theodore Senior. I do try to change my writing style each time to make the whole necessary charade a little more convincing.”

Papy just stood there gaping.

Mr. Gold laughed and patted Papy on the shoulder. “Well, I am honored to have fooled someone as well versed in the field as yourself, Monsieur Mercier.”

My completely unflappable grandfather was still rooted to his spot. “A revenant,” he said. “There is only one Theodore Gold. The whole dynasty of eminent antiquity experts is . . . one person. And you are the G. J. Caesar I have been selling pieces to for the last few decades?”

“I think I may have actually bought a piece from you before that under Theo Gold Junior’s alias, Mark Aurelius, before I passed the collection down to myself,” Theodore pointed out helpfully.

“May I sit down?” Papy asked, the color having drained from his face.

“Please,” said Mr. Gold, gesturing toward a couch. Set before it was a low table with bottles of sparkling water and a platter of mini-cheesecakes.

“I wasn’t sure if you ate on the plane,” he commented as we all sat. “Now, we have much to talk about. May I guess that the volant revenant I sense is the bardia Vincent that Jean-Baptiste mentioned?” He waited and then nodded his head. “Good. So from what I am told, you are looking for a giant thymiaterion with instructional symbols engraved into the stem.”

Bran explained about his family’s records, and retrieving the book from his bag, he read the passage aloud.

Mr. Gold looked impressed. “Incredible. It certainly is tempting to ask to see the rest of the book”—he paused as Bran shook his head—“but I realize that the information it holds must be confidential. I trust you are giving us all of the details you have on the matter?”

Bran nodded. “I’ve gone through my family’s entire records, and this is the only mention of re-embodiment.”

“Fine,” Mr. Gold said, clasping his hands together. With his timeless look and white suit, he reminded me of a young Robert Redford in the seventies version of The Great Gatsby. Or a character straight out of an Edith Wharton novel: handsome and wheaten haired, with that tanned just-stepped-off-the-yacht look that very wealthy people have.

“I understand that time is pressing,” he was saying, “and that Vincent can be called back by the traitor at any time. How long has it been since she let you go?” he asked. “Yesterday before noon,” he repeated, looking at his watch. “It’s eleven p.m. now, so in six hours or so we’ll be coming up on two days, Paris time. Well, let’s hope she doesn’t feel like yanking you back sooner. We will need all of the time we can get to decode the symbols.”

He tossed back the rest of his glass and stood. “And on that note, we should be going.”

“Where?” I asked, as we all rose from the table.

“Why, to see the thymiaterion,” he said.

“It isn’t here?” I asked, glancing around the room.

“No, I only keep a few of my favorite objects here. The world’s most complete collection of revenant-themed art happens to reside across the street.”

“At the Metropolitan Museum of Art?” asked Papy, incredulous.

“Yes, my dear man,” responded Mr. Gold with a wry grin. “At the Met.”

TWENTY-THREE

“I’VE NEVER VISITED THE MET AT MIDNIGHT,” I whispered as I followed the others to a side door, far from the main entrance’s grand stairway.

Has that been a lifelong dream? came Vincent’s words.

“A whole museum of paintings to myself, yes,” I answered. “A museum full of ancient objects at night, though, has a sky-high creep factor.” I shivered, recalling a frequent childhood nightmare in which the statues in Papy’s gallery all came alive.

Mr. Gold took out a set of keys, opened a first set of doors, led us through a second set, and then past a seated security guard. He began reaching into his pocket for ID, but the guard just nodded and waved him by.

“This way,” Mr. Gold said. We crossed a cavernous room filled with ancient pottery perched on stands and protected under glass cases. In a dark corner of the room, we piled onto an open service elevator. Our host waited for the doors to shut tight, fitted a key into the elevator’s control panel, and pressed a button for one of the subbasements.

As we rode the car down, I couldn’t help but ask, “So how did you get a key to the museum? And access through the employee’s entrance?”

“I am an employee,” said Mr. Gold, as we exited the elevator. “I am officially the head curator of antiquities, but I’m not around very much. If the same staff sees me over long periods of time, things would seem rather . . . questionable, wouldn’t they?”

We trailed behind him down several low-lit corridors, and stopped before a double door with a sign marked ARCHIVES. Gold typed a code into a keypad and inserted another key into the lock.

“Securing a substantial donation to the museum—to the tune of several hundreds of millions of dollars—unsurprisingly convinced the museum to give me private access to this entire area.” He opened the door and flicked on a light switch.

Before us was an enormous warehouse-size space, beautifully decorated with scattered columns and frescoed walls. Everything was individually spotlit, with additional lighting glowing from panels in the walls and floor. I shivered in astonished delight, and glanced at Papy to gauge his reaction. My grandfather looked like he had died and gone to antiquity-dealer heaven.

This was the secret collection of revenant art. It must have held thousands of objects ranging from small pieces of jewelry mounted in cases against the wall to giant marble statues of heroes carrying massive weapons and wearing nothing but the signum bardia on cords around their neck.

“You are three of the only humans to have visited this important historical collection,” Mr. Gold said with a wry smile. “Although I occasionally have revenant visitors drop by on appointment. How much do you know about revenant history?” he asked me.

“Vincent has told me some stories. And Gaspard has mentioned things from time to time. But my overall comprehension is probably pretty lacking.”

You’re being modest, Vincent said. I happen to know you’ve read everything you can get your hands on.

I didn’t respond. The less Mr. Gold thought I knew, the more he would tell me.

We walked slowly toward the other end of the large hall. Though Jules, Papy, and Bran were looking around as we walked, they were all listening in on our conversation.

“Well, considering the project we are about to undertake, it would be useful to give you a quick history of both revenants and our guérisseur friends.” His voice took on a storytelling pitch, and I could tell he had told this tale before, although I guessed it was to new revenants, and not to human outsiders.

“Ever since man existed, there have been bardia and numa. But in ancient times they were worshiped as heroes and reviled as demons. Both lived among humans as either their guardians or, in the case of numa, dangerous but effective allies for men who sought power at any cost.

“Before modern medicine, healers, known in France as guérisseurs, were much more common and well respected among their fellow men. Since guérisseurs’ powers developed in accordance to the needs of the communities around them, a small percentage of them developed powers to help revenants with their own specific requirements.”

Bran stopped looking around and began paying full attention to Mr. Gold’s story, drinking in every word.

“Like the bayati—humans with paranormal abilities who were later called saints—revenants around the world began being persecuted with the rise of major world religions. In Eastern countries some were able to hide themselves among mortal holy men and shamans. But not in the Western world. It was at this point—after being hunted and destroyed on a massive scale during the fourth century—that revenants withdrew from the mortal world.”

This fit in with what I already knew, and explained a lot of what I had seen in the flame-fingers’ archives. I began to wonder if the word “archives” didn’t apply as much to the images as they did to the few books and objects I had seen. The wall paintings explained the story Mr. Gold was telling in a much more memorable way.

I drank in every word as he continued. “In order to facilitate the revenants’ disappearance from human awareness, the bardia launched a concerted campaign to hide revenant-themed art and literature that was common enough in the Roman times and before. The numa were on board with this, having lost just as many of their own number in the religious persecution.”

Mr. Gold stopped in front of a statue of a man lying on a bed. Hovering over him was a woman with a tattoo identical to Bran’s etched into her forearm. She was passing her hands over the dead-looking man.

It’s probably a dormant revenant, came Vincent’s words, and I nodded, agreeing.

“As guérisseurs became increasingly scarce,” Mr. Gold continued, gesturing toward the statue, “the number who possessed gifts aiding revenants diminished, and revenants’ knowledge of them fell out of the common use. I, however, am in possession of some ancient tablets that spell out some of the gifts of these guérisseurs.” He turned to Bran. “You can see our auras, can you not?”