“But one who knew how to make an Infernal Device, triggered by clock-work, might rig it in more than one way,” Daniel said. “I hypothesize that the machine uses phosphorus to create fire at a certain time. In one case, that fire might be conveyed to a powder-keg, which would explode. In another, it might simply ignite a larger quantity of phosphorus, or of some other inflammable substance, such as whale-oil.”

“But in any case, you are saying, the machines-and their makers-are the same!” said Orney.

“Then it is a matter for your Constables!” Kikin proclaimed.

“As the evildoers are nowhere to be seen, there is nothing for a Constable to do,” Daniel pointed out. “It is ultimately a matter for a Magistrate.”

Kikin snorted. “What can such a person do?”

“Nothing,” Daniel admitted, “until a defendant is presented before him.”

“And who should do that, in your system?”

“A prosecutor.”

“Let us find a prosecutor, then!”

“One does not find a prosecutor in England, in the way one finds a constable or a cobbler. One becomes a prosecutor. We who are the victims of these Infernal Machines must be the Prosecutors of those who made them.”

Kikin was still in difficulties. “Do you mean to say that each of us pursues a separate Prosecution, or-”

“We might,” Daniel said, “but I suppose it would be more efficient”-this word chosen to delight the ears of Mr. Orney, who indeed looked keen on it-“for you and you, and I, and the Hand-in-Hand Fire-Office if they are so inclined, and Mr. Threader and Mr. Arlanc, to pursue it jointly.”

“Who are Threader and Arlanc?” Kikin asked. For Daniel had left them out of his Crane Court narration.

“Why,” said Daniel, “you might say that they are the other members of our Clubb.”

“THE RIVER FLEET is a parable-I would venture to say, a very mockery-of humane degradation!” announced Mr. Orney, by way of a greeting, as he stomped down stairs into the crypt.

Here, if he had evinced dismay, turned on his heel, and run back up the steps, no man would have thought less of him.

Mr. Threader-who’d arrived a quarter of an hour previously-had been quite aghast. “It is consecrated ground, sir,” Daniel had told Mr. Threader, “not some pagan Barrow. These souls are Members in Good Standing of the Community of the Dead.” And he had shoved his hand into a tangle of pallid roots and ripped them out of the way to reveal an ancient brass plate, bejeweled with condensed moisture, and gouged with a dog’s breakfast of rude letters, no two the same size, evidently copied out by some medieval artisan who knew not what they signified.

Re-forming them into Latin words and sentences was a job for patient clerks, or clerics. But this was Clerkenwell, where such had been coming to draw water for at least five hundred years. Decyphered, the letters said that behind this plate lay the earthly remains of one Theobald, a Knight Templar who had gone to Jerusalem whole, and come back in pieces. Next to it was another plate telling a similar tale about a different bloke.

Unlike Mr. Threader, Mr. Orney seemed not in the least put out by the surroundings. Daniel had been at pains to set up candles and lanthorns wherever he could, which generally meant the lids of the half-dozen blocky sarcophagi that claimed most of the floor. By the light of these, it was possible to make out a vaulted roof. This was not a soaring, lost-in-dimness type of vaulted roof. It was barely high enough for a bishop to walk up the middle without getting slime on his mitre. But the stones had been well joined, and the room had survived, a pocket of air in the dirt, oblivious to what might be happening above.

Mr. Orney paused for a moment at the foot of the stairs to let his eyes adjust, which was very prudent, then advanced on Daniel and Mr. Threader, dodging round nearly invisible puddles with sailorly grace as he made his way between the sarcophagi. He was showing a lack of curiosity, and a refusal to be awed, that in another man would have been infallible proof of stupidity. Since Daniel knew him not to be stupid, he reckoned that it was a sort of religious assertion; to a Quaker, these Papist crusader-knights were as primitive, and as beside the point, as a clan of Pictish barrow-diggers.

“Why, Brother Norman? Because the Fleet, like life, is brief and stinky?” inquired Daniel politely.

“The stench at its end is only remarkable because the Fleet runs so pure and fresh at the beginning; issuing as it does from diverse wells, holes, rills, and spaws hereabouts. Thus does a babe, fresh from the womb, soon fall prey to all manner of gross worldly-”

“We get the point,” Mr. Threader said.

“And yet the interval between the two is so brief,” Mr. Orney continued, “that a robust man” (meaning himself) “may walk it in half an hour.” He pretended to check his watch, as proof that this was no exaggeration. But it was too gloomy in here to make out the dial.

“Do not let our host see your time-piece, sir, he’ll have it apart before you can say, ’avast, that is expensive!” ’ said Mr. Threader, sounding as if he knew whereof he spoke.

“Never mind,” said Daniel, “I recognize it as the work of Mr. Kirby, probably undertaken when he was journeyman to Mr. Tompion, nine years ago.”

This produced a brief but profound-one might say, sepulchral-silence. “Well discerned, Brother Daniel,” Mr. Orney finally said.

“After the mysterious explosion,” remarked Mr. Threader, “Dr. Waterhouse secreted himself in an attic no less gloomy than this tomb, and would not return my letters for many weeks. I feared he had no stomach for Prosecution. But when he returned to polite society, behold! He knew more of clocks, and the men who make ’em, than any man alive-”

“That is rank flattery, sir,” Daniel protested. “But I will grant you this much, that if our Clubb is to achieve its Goal, we must learn all we can of the Infernal Devices in question. They were driven by clock-work, you may be sure on’t. Now, thirty years ago, I knew Huygens and Hooke, the most illustrious horologists of the ?ra. But when I returned to London I found that I was no longer privy to the secrets, nor acquainted with the practitioners, of that Technology. In my eagerness to redress this, I did from time to time forget my manners, prising open clocks and watches to examine their workings and decypher their makers’ marks, as Mr. Threader has waspishly reminded me. The result: we are met here in Clerkenwell!”

“Vy the khell are ve meetink khere?” demanded a new voice.

“God save you, Mr. Kikin!” answered Mr. Orney, not very informatively.

“If you had arrived on time,” said the irritable Mr. Threader, “you’d have had an answer just now from Dr. Waterhouse.”

“My carriage is axle-deep in a bog,” was the answer of Mr. Kikin.

“That bog is a valuable discovery,” said Mr. Orney, who waxed jovial when Mr. Threader was in a bad mood. “Put a fence round it, call it a Spaw, charge a shilling for admission, and you’ll soon be able to buy a phaethon.”

The Russian was ill-advisedly descending a slimy twelfth-century staircase into his own shadow. A flickering orange trapezoid was projected onto the floor from above, skating back and forth like a leaf coming down from a tree. It could be inferred that Mr. Kikin’s associate, who was too tall to enter the crypt, was standing in the antechamber at the top of the stairs waving a torch around, trying to get the light around his master’s shoulders.

“This damp will kill us,” Mr. Kikin predicted in a stolid way, as if he got killed every morning before breakfast.

“As long as the candles don’t go out, we have nothing to fear from this atmosphere,” said Daniel, who was deeply sick and tired of hearing semi-learned people ascribe all their problems to damps. “Yes, water seeps in here from the moist earth. But Mr. Orney was only just now remarking upon the marvellous purity of these waters. Why do you think the Knights Templar built their Temple here? It is because the nuns of St. Mary and the Knights Hospitallers both drew their water from the same well here, and didn’t die of it. Why, just up the road, wealthy gentle-folk pay money to soak in these same moistures.”