"I dislike the way you paint the business," Mallory said, with a slow prickle of anger. "If we hadn't given them guns, they wouldn't have helped us. We might have dug for years, if it weren't for Cheyenne help… "

"I doubt one could make that case to a Texas Ranger," Oliphant said. "For that matter, I doubt one could make it to the popular press… "

"I've no intention of speaking to the press. I regret having spoken with you. Clearly you're no friend of the Commission."

"I already know far more about the Commission than I should have cared to discover. I came here to convey a warning, Dr. Mallory, not to request information. It is I who have spoken too openly—have been forced to do so, since the Commission's blundering has very obviously endangered your life, sir."

There was force in the argument. "A point well taken," Mallory admitted. "You have warned me, sir, and I thank you for that." He thought for a moment. "But what of the Geographical Society, Mr. Oliphant? What is their place in this?"

"An alert and observant traveler may serve his nation's interests with no prejudice to Science," Oliphant said. "The Geographical has long been a vital source of intelligence. Map-making, naval routes…"

Mallory pounced. "You don't call them 'amateurs', then, Mr. Oliphant? Though they too muck about with dark-lanterns, where they oughtn't?"

A silence stretched. "They're our amateurs," Oliphant said dryly.

"But what, precisely, is the difference?"

"The precise difference. Dr. Mallory, is that the Commission's amateurs are being murdered."

Mallory grunted. He leaned back in the chair. Perhaps there was real substance to Oliphant's dark theory. The sudden death of Rudwick, his rival, his most formidable enemy, had always seemed too convenient a stroke of fortune. "What does he look like, then, this Texian assassin of yours?"

"He is described as tall, dark-haired, and powerfully built. He wears a broad-brimmed hat and a long pale greatcoat."

"He wouldn't be a ratty little race-track swell with a protruding forehead"—Mallory touched his temple—"and a stiletto in his pocket?"

Oliphant's eyes widened. "Dear heaven," he said softly.

Suddenly Mallory found he was enjoying himself. Discomfiting the suave spy had touched some deep vein of satisfaction. "Had a nick at me, this feller," Mallory said, in his broadest Sussex drawl. "Derby Day, at the races. Uncommon nasty little rascal… "

"What happened?"

"I knocked the scoundrel down," Mallory said.

Oliphant stared at him, then burst into laughter. "You're a man of unexpected resources. Dr. Mallory."

"I might say the same of you, sir." Mallory paused. "I have to tell you, though, I don't believe the man was after me. He'd a girl with him, a track-dolly, the two of them bullying a lady—"

"Do go on," Oliphant urged, "this is uncommonly interesting."

"I'm afraid I can't," Mallory said. "The lady in question was a personage. "

"Your discretion, sir," Oliphant said evenly, "does you credit as a gentleman. A knife-attack, however, is a serious crime. Have you not informed the police?"

"No," Mallory said, savoring Oliphant's contained agitation, "the lady again, you see. I feared to compromise her."

"Perhaps," Oliphant suggested, "it was all a charade, calculated to involve you in a supposed gambling-brawl. Something similar was worked on Rudwick—who died, you well recall, in a ratting-den."

"Sir," Mallory said, "the lady was none other than Ada Byron."

Oliphant stiffened. "The Prime Minister's daughter?"

"There is no other."

"Indubitably," Oliphant said, a sudden brittle lightness in his tone. "It does strike me, though, that there are any number of women who resemble Lady Ada, our Queen of Engines being a queen of fashion as well. Thousands of women follow her mode."

"I've never been introduced, Mr. Oliphant, but I've seen her in Royal Society sessions. I've heard her lecture on Engine mathematics. I am not mistaken."

Oliphant took a leather notebook from his jacket, propped it against one knee, and uncapped a reservoir-pen. "Tell me, please, about this incident."

"In strictest confidence?"

"You have my word."

Mallory presented a discreet version of the facts. He described Ada's tormentors, and the circumstances, to the best of his ability, but he made no mention of the wooden case with its French Engine-cards of camphorated cellulose. Mallory considered this a private matter between the Lady and himself; she had burdened him with the guardianship of this strange object of hers, and he regarded this as a sacred obligation. The wooden case of cards, carefully wrapped in white specimen-linen, lay hidden among the plastered fossils in one of Mallory's private lockers at the Museum of Practical Geology, awaiting his further attention.

Oliphant closed his notebook, put away his pen, and signaled the waiter for drinks. The waiter, recognizing Mallory, brought him a huckle-buff. Oliphant had a pink gin.

"I would like you to meet some friends of mine," Oliphant said. "The Central Statistics Bureau maintain extensive files on the criminal classes—anthropometric measurements, Engine-portraits, and so forth. I should like you to try to identify your assailant and his female accomplice."

"Very well," Mallory said.

"You shall be assigned police protection, as well."

"Protection?"

"Not a common policeman, of course. Someone from the Special Bureau. They are very discreet."

"I can't have some copper tagging always at my heels," Mallory said. "What would people say?"

"I worry rather more what they'll say if you were to be found gutted in some passage. Two prominent dinosaur-savants, the both of them mysteriously murdered? The press would run quite wild."

"I need no guard. I'm not frightened of the little pimp."

"He may well be unimportant. We shall at least know that, if you are able to identify him." Oliphant sighed delicately. "No doubt it's all a very trumpery affair, according to the standards of Empire. But I should reckon it as including the command of money; the services, when needed, of that shady sort of Englishman, who lives in the byways of foreign life in London; and lastly, the secret sympathy of American refugees, fled here from the wars that convulse that continent."

"And you imagine that Lady Ada has fallen somehow into this dire business?"

"No, sir, none of it. You may rest assured that that cannot possibly be the case. The woman you saw cannot have been Ada Byron."

"Then I regard the matter as settled," Mallory said. "If you were to tell me Lady Ada's interests were at hazard, I might agree to almost any measure. As things stand, I shall take my own chances."

"The decision is entirely yours, of course," Oliphant said coolly. "And perhaps it is still early in the game to take such stem measures. You have my card? Let me know how matters develop."

"I will."

Oliphant stood. "And remember, should anyone ask, that today we have discussed nothing more than the affairs of the Geographical Society."

"You've yet to tell me the name of your own employers, Mr. Oliphant. Your true employers."

Oliphant somberly shook his long head. "Such knowledge never profits, sir; there is nothing but grief in such questions. If you're wise, Dr. Mallory, you'll have nothing more to do with dark-lanterns. With luck, the whole affair will simply come to nothing, in the end, and will fade away, without trace, as a nightmare does. I shall certainly put your name forward for the Geographical, as I have promised, and I do hope that you will seriously consider my proposal regarding possible uses of the Bow Street Engines."

Mallory watched as this extraordinary personage rose, turned, and strode away, across the Palace's rich carpet, his long legs flashing like scissors.