“Speaking of which,” said Daniel, “here is something for you.” During Leibniz’s remarks he had from time to time glanced up at the traffic coming out of London on the Bridge. Now he raised a hand and waved to someone up in the Square. Leibniz followed his eye-line up to behold William Ham, the banker, waving back from atop a cart that had just drawn to a halt at the head of the stairs. It was populated by a conspicuously large number of beefier-than-average porters, some of whom remained where they were, engaging all and sundry passersby in stare-downs. Others hopped off and went to work carrying several small crates down the stairs and piling them at Leibniz’s feet. At about the same time, the lighter from Sophia drew close enough to pelt them with rope-ends, and several watermen who loitered on the starling caught them out of the air and made the boat fast. A Hanoverian servant vaulted over the gunwale and bent to take and move the first of the crates; but Leibniz asked him in German if he would terribly mind waiting for a moment. “If these are what I think they are-” he said to Daniel.

“Indeed.”

“Then later they shall be counted by men who are ever so sharp when it comes to weights and measures; and I would that all of the numbers add up!”

So the crates accumulated until the wagon up above was empty. Each had been sealed with a medallion of wax bearing the imprint of the Bank of England-for that is where they had been stored until a few minutes ago, and one could still smell the damp of the Bank’s cellars escaping from the pores in the wood. William Ham came down with a great wallet of musty paperwork, on which was traced the provenance of what was in the crates, beginning with Solomon Kohan’s accompt of the gold taken from Minerva, and passing through all of the intermediate stages of rolling and cutting at the Court of Technologickal Arts and punching at Bridewell. Leibniz examined it all, and finally counted the crates (7) and counted them again (7) and asked Daniel to verify the count (7). Finally he signed the papers GOTTFRIED FREIHERR VON LEIBNIZ in diverse places, and Daniel counter-signed as Witness. At last Leibniz gave leave for the crates to be moved aboard the lighter; but he counted them as they were moved (7).

“It is a start,” Daniel said. “There are many more yet to come, as you know. But as long as you were making a journey to Hanover anyway, I thought I might as well give you all that we have managed to bang out so far.”

“It adds a most pleasing coda to what might otherwise be a melancholy parting,” said Leibniz, and squared off before Daniel, forcing his features into a simulacrum of a smile. “And it really ought to put to rest any mistaken thoughts that might have been troubling your sleep as to whether you have done right by Wilkins. You have, sir, done him proud.”

Daniel was now helpless to say anything and so he stepped forward and embraced Leibniz hard. Leibniz returned the embrace, giving as good as he got, then broke away and turned his back on Daniel before Daniel could see his face and vaulted into the boat almost in the same motion. He counted the crates, or pretended to, one last time as lines were cast off and the boat fell away and yawed in the turbulent gulf of the lock.

“Seven?” Daniel shouted.

“Seven exactly!” came the answer. “I shall see you, Daniel, on Parnassus, or wherever it is that Philosophers end up!”

“I think they end up in old books,” said Daniel, “and so I shall look for you, sir, in a Library.”

“That is what I am building,” said Leibniz, “and that is where you shall find me. Good-bye, Daniel!”

“Good-bye, Gottfried!” Daniel shouted, and then stood and watched for some time as the boat became indistinct, and quite lost itself, in the welter of shipping in the Pool of London, there below the charred battlements of the Tower. It was almost a mirror image of the way Leibniz had appeared, out of nowhere, forty-one years earlier, except that the mirror was a misty and a streaky one. For much had changed in those years and Daniel could not watch with the clear eyes of a young man.

Let other Princes, surrounded with couching Slaves, glory in the unlimited Obedience of stupid Wretches that have no sense of Liberty, and little else to brag of, than that like so many Stocks or Stones, they can bear being kick’d and trod upon, whilst a King of Great Britain, almost alone in all the Universe, may boast himself to be a Monarch over Rational Creatures.

-The Mischiefs That Ought Justly to Be Apprehended from a Whig-Government, ANONYMOUS, ATTRIBUTED TO BERNARD MANDEVILLE, 1714

“NOW THERE IS SOMETHING you don’t see every day!” exclaimed Roger Comstock, Marquis of Ravenscar. It was the first thing he had said in a quarter of an hour-a long time, for him-and it prodded Daniel out of a sort of walking coma into which he had sunk during this, the third hour he and Roger had spent standing in this queue.

Daniel started awake and looked round.

Philosophers came to Greenwich all the time, and some even lived here, for the Observatory was up on the hill. Kings and Queens came here rarely, even though the place belonged to them. Architects came here frequently, and almost always wished they hadn’t. For building-projects at Greenwich always had money trouble, and things seemed to decay faster than they could be erected. Inigo Jones had been adroit enough to scamper in and out of this Slough of Despond and actually get a thing built and roofed before it got bogged down: this was the Queen’s House, and the secret to its success was that it was small. The bloody thing seemed to be a mile from the river. Or so it felt to Daniel and the others in the queue, whose head was lodged somewhere in Mr. Jones’s Opus and whose tail wandered all the way to bankside. Some stone steps descended to the river there. A gaudy barge had been made fast. Beyond, anchored in a deeper part of the Thames, was the Navy ship that had fetched George, King, over from the Eurasian landmass. Daniel was only able to see these things because he and Roger had, at long last, reached the foot of, and (half an hour later) trudged to the top of, one of the curving stairways that led up to the terrace of the Queen’s House. From there a few minutes’ shuffling and doddering had got them as far as the front door. They were on the threshold. Daniel had his back to the entrance and was enjoying the view-such as it was-down to the river. Roger, with his stoat-like instinct for dark, seething, infested places, faced opposite. The open doors expired a miasma of rose-water and armpits, cut with the tang of new paint, a-throb with a sort of Beowulfian melange of German and English. Daniel couldn’t bear to turn round and see whatever Roger found so interesting, and so he and Roger passed over the threshold in this Janus-like configuration. Daniel was convinced he had caught a glimpse of Sir Christopher Wren, about an hour behind them in the queue, and had been trying to work out some way of getting Wren’s attention, and of inducing him, by furtive gesticulations, to jump the line. But it was perfectly hopeless; this was the worst place in the world for it. Twenty-some years ago, Wren had been brought in to impose some order on this place, as only Wren could. It had been his place ever since. He was working for free-the idea was to build a hospital for Naval pensioners. Queen Mary had started flogging the plan after the battle at La Hougue in ’92, but she had expired in ’94. There was no telling when a driblet of cash might spill forth from the Royal coffers. Whenever this occurred, Wren would blow it immediately on great blocks of stone and slam them down at the corners, and later along the perimeters, of the things he proposed to build here. For he could see perfectly well that he’d be dead before it went up. Later, and lesser, architects might botch the details, but none would be able to place the actual buildings other than where Wren had flung these plinths into the earth. His deputy Nick Hawksmoor, perceiving the genius of this strategy, and very much getting into the spirit, had lately bought a great bloody block of sculpture-grade marble at some scandalously low price and arranged for it to be vomited up on to the riverbank; when they could get enough money to hire someone to beat on it with a chisel, they’d make it into a brilliant statue of whomever happened to be King or Queen then. And so the general picture that Daniel was seeing from the terrace-and that owned Wren’s attention-was one of colossal foundations, laid by giants: a tiered echelon of rectangles-a Pythagorean dream. In that it was all foundations and no actual buildings, it seemed to confirm all that the Princess of Wales had said, a month ago, about the System, and the importance of putting it on a sound philosophical base. But what Newton and Leibniz had come up with-or failed to-seemed rickety compared to the works of Wren: further evidence that Wren had chosen wisely by turning away from pure philosophy and applying his genius to architecture.