“This was an odd bloke, who was loyal to Jack for many years, but went his own way in recent years, and tried to burn the Tsar’s new ships in Rotherhithe even as he was conniving with Jack to invade the Tower and sully the Pyx,” Daniel explained to Leibniz. “He was a great villain. But it is a shame to see him, or anyone, lying thus unattended.” At that moment, though, he spied Saturn approaching, with a few lads behind him and an empty wagon.

Daniel, Leibniz, and Solomon caught up with Peter and his entourage at Clerkenwell Court, just as they were mounting up to travel back to Rotherhithe. Daniel sent with them a note to Mr. Orney, giving him the news that the incendiary who had attacked his shipyard was dead. Leibniz took his leave of the Tsar, and Solomon promised to rejoin the party later at Orney’s. For it would take a few days to inspect and take delivery of the new ships, and to man them; then they would sail directly into combat against the Swedes in the Baltic. Then the Tsar and his company departed.

Daniel did not know why, but he now felt more energetic than at any time in the last few weeks. Perhaps that was what made a Tsar a Tsar: the ability to move those around him to great exertions. Perhaps the sight of the dead Yevgeny had reminded Daniel, as if he needed it, that he should not live forever. Or perhaps it was a simple desire to get the Solomonic Gold moving, to get it out of his possession as fast as he could. Others who toiled in the Court of Technologickal Arts seemed to feel likewise, for suddenly-after having avoided the place for nearly a week, because of Whig/Tory strife and Hanging-shenanigans-they began to show up and pry the planks off the fronts of their little workshops around the Court and heave the dust-cloths off their machines. Saturn came home, having seen to the transfer of Yevgeny’s body to a Russian church somewhere, and by sundown the Court was in full production. They rolled, cut, and weighed the largest batch of plates they had ever made in a single day. Then Daniel pressed half a dozen idle but relatively sober Mohawks into service as escorts, and they took the plates down the banks of the Fleet to Bridewell.

The very first cargo unloaded from Minerva upon her arrival on Thursday had been the paper cards on which Daniel had, over the course of a dozen years’ toil at the Massachusetts Bay Colony Institute of Technologickal Arts, written out the tables of the Logick Mill. These had already been forwarded to the card-punching workshop in Bridewell, which now sported half a dozen organs.

“It’s all right,” insisted Hannah Spates, upon being rousted from bed, “all the girls are accustomed to working nights anyway.” And so presently the shop was alight, and alive, with Hannah and five other nimble-fingered girls working the keys of the organs, and several pairs of big strumpets spelling each other on the bellows, fueled by beer from a barrel that Saturn fetched from a brewery across the ditch in Black Fryars. Some of the cards were punched even before he returned with this enhancement, and a good many more after-though Daniel insisted that the six women at the keys must remain dry. The entire batch was finished before three in the morning, and the banker William Ham, who’d been abducted by a Mohawk raiding-party from his bed in the city, did the sums, and weighed the cards and the bits that had been punched out of them, to the evident satisfaction of Solomon Kohan. The Jew had watched all with the keenest interest, but occasionally scowled at those aspects of the operation that looked as if they might be vulnerable to theft or embezzlement.

Daniel now presented him with a tiny purse sewn of the finest kid. It was no larger than a walnut, but plumped heavily in the palm of the hand, like a globule of quicksilver. “These are the tiny disks punched from the cards by the organs,” Daniel explained. Solomon nodded; he had already observed how these motes of gold were harvested from the machines and weighed by Mr. Ham. “As a rule we take these back and melt them down to make more card-stock. Tonight I make an exception and give them to you, Monsieur Kohan, as a memento of your visit to London, and a token of my esteem.” Solomon clapped the wee purse between his hands and accepted the gift with a bow.

“Now,” Daniel continued, “if you do not mind staying awake a little longer, you may see our provisions for keeping the finished plates safe until they are ready to be shipped to St. Petersburg.”

Solomon said he didn’t mind, so they loaded the chest of new plates into an open wagon and drove it through the streets of London, which were deserted save for the circulation of Vault-wagons to and from the brink of Fleet Ditch. Through Ludgate in the shadow of St. Paul’s they entered into the city, and Daniel told the story of riding past Old St. Paul’s, before the Fire, at the height of the Plague, when the City had been as empty and quiet as it was tonight, and the doomed church surrounded by a rampart of half-buried corpses. Presently they came out of the churchyard onto Cheapside and trundled east to the threshold of the money-district where the way forked into several streets: Threadneedle, Cornhill, and Lombard. They chose Threadneedle, and went up but a short distance to the fabrique of the Bank of England.

After a brief conversation with William Ham, the night porter suffered them to enter, and even offered to relieve Saturn of the burden in his arms: a strangely heavy locked chest. Saturn politely declined. William Ham dismissed the porter and sent him back to his bed. Lanthorns were distributed. Monsieurs Kohan, Waterhouse, Hoxton, and Ham moved through the Bank in their own pool of light, quickly leaving behind the parts of the establishment that looked like a bank (finished rooms with windows and furniture) and descending into its cellar.

By no stretch of the imagination could this be understood as a proper and rational basement. The ground under the Bank was a foam of cavities, some recent, some ancient, but mostly ancient. Most were connected to at least one other. This made it possible to navigate through the foam without resorting to shovels and blasting-powder, provided only that one understood the graph of their connexions. This was a job for a banker if ever there was one. Mr. Ham changed direction incessantly, but gave them all some reassurance by only rarely stopping to think, and only once backtracking. Anyone who had even a layman’s knowledge of structures could see at a glance that, over the ages, more than one building had been erected on this site, and many a builder had stayed up late at night worrying about whether the foam could support it. The diverse vaults, arches, timbers, pilings, footings, and rubble-walls that threw back the light of their lanthorns, and forced William Ham into catastrophic reversals, were what those builders had effected when they had gotten worried enough. The timbered tunnels, linteled doorways, and arched passageways through which William conducted them were evidence that other builders had gambled that the inter-locking foundation-works were strong enough, and would not give way if judiciously undermined.

“It is just the sort of hidden mare’s nest about which one has bad dreams when putting one’s money in a Bank,” Saturn reflected, at a moment when he and Daniel were several convolutions behind Mr. Ham and Monsieur Kohan. But a moment later they caught up to find William Ham looking a bit huffy. He was directing their attention to a Gothik arch sealed off by a new portcullis of iron bars. Pyramidal beams of lanthorn-light, shining through the interstices, careered around the space on the other side. Slivers of gold and silver winked between the planks of crates. “The inherited complexities of the property,” said Mr. Ham, “are, as you can see, giving way to a steady programme of rationalization. Where weaknesses are found, they are made strong. Several entire chambers have been infilled. Where sound vaults are discovered, they are fortified, as here.” Mr. Ham then took them on a lengthy detour intended to bolster these and other assertions with evidence visual and anecdotal. By this point Daniel could no more have made his way out to the street than he could have balanced the Bank’s accounts on his fingers. But he did feel that they were on average descending, for the air got damper and colder as they went, and the architecture changed. There was less wood, and what there was of it was rotten, and being replaced by masonry. They passed through a Gothik stratum into a Romanesque, or perhaps Roman-boundaries were ambiguous, as the site might have gone unchanged for half a millennium after the Romans had pulled out. Evidence of dampness was all round, though actual standing water was rare. It looked, in other words, as though they had found a way to channel groundwater and drain it out of the place-probably to Walbrook, a local creek that was famous because, at some point after the Fall of Rome, it had gone missing.