They had a surprising bit of warm weather then, for a day or two. Daniel took advantage of it by getting out of that coach whenever it stopped moving. When he tired of walking, he had his great raccoon-lined cape brought out-it filled a trunk by itself-and spread upon the wet grass. There was always grass, for they always stopped in places with lawns, and it was always short, for there were always sheep. On his square of American raccoon fur he would sit and read a book or eat an apple, or lie on his back in the sun and doze. These little picnics enabled him to make further observations of Mr. Threader’s business practices, if that is what they were. From time to time, through a manor-house window, across a Great Lawn, or between sparkling fountain-streams, he would catch sight of Mr. Threader passing a scrap of paper to a gentleman, or vice versa. They looked like perfectly ordinary scraps-not engraved, like Bank of England notes, and not encumbered with pendulous wax seals like legal documents. But their passing from hand to hand was always attended with much courtesy and gravitas.

If children were present, they would follow Mr. Threader about, and, whenever he stopped moving, form up around him and look expectant. He would pretend not to notice them at first. Then, suddenly, he would reach out and snatch a penny out of some child’s ear. “Were you looking for this? Do take it-it is yours!” he’d say, holding it out, but before the little hand could grasp it, the penny would vanish as mysteriously as it had appeared, and be discovered a moment later in a dog’s mouth or under a stone, only to disappear again, amp;c., amp;c. He would drive the little ones into a frenzy of delight before finally bestowing a silver penny on each of them. Daniel hated himself for being so fascinated by what he knew to be the cheap jugglery of a carnival mountebank, but he could not help watching. How, he wondered, could the wealthy parents of these children entrust money-as they apparently did-to a prestidigitator?

On one Lawn, while he dozed, sheep came up all around him, and the sound of them grazing became a sort of continuo-line to his dreams. He opened his eyes to see a set of blunt yellow sheep-teeth tearing at the grass, inches from his face. Those teeth, and the mass of winter wool that had turned the animal into a waddling, greasy bale, struck him as most remarkable. That solely by gnawing at the turf and lapping up water, an animal could generate matter like teeth and wool!

How many sheep in England? And not just in January 1714 but in all the millennia before? Why had the island not sunk into the sea under the weight of sheep-bones and sheep-teeth? Possibly because their wool was exported-mostly to Holland-which was in fact sinking into the sea! Q.E.D.

On the 27th of January they entered a forest. Daniel was astonished by its size. He thought they were somewhere near Oxford-it went without saying that they were avoiding the city itself. He saw a fragment of Royal heraldry, but old and ivy-grown. They must be on the estate that, in his day, had been known as the Royal Manor and Park of Woodstock. But Queen Anne had given it to the Duke of Marlborough in gratitude for his winning the Battle of Blenheim, and Saving the World, ten years ago. The Queen’s intention was that a magnificent Palace was to be thrown up there for Marlborough and his descendants to dwell in. If this had been France, and the Queen had been Louis XIV, it would have been done by now-but it was England, Parliament had its knobby fingers around the Monarch’s throat, and Whigs and Tories were joined in an eternal shin-kicking contest to determine which faction should have the honor of throttling her Majesty, and how hard. In the course of which, Marlborough, a quintessential Tory, and son of a Cavalier, had somehow been painted as a Whig. Queen Anne, who had decided, very late in life, that she much preferred Tories, had stripped him of military command, and in general made life so unrewarding for him in England that he and Sarah had gone away to Northern Europe (where he was considered the greatest thing since beer) to bask in the gratitude of Protestants until such time as the Queen stopped fogging mirrors at Kensington Palace.

Knowing all of this, and knowing what he knew of construction sites and of the English climate, Daniel expected to see a lifeless morass surrounded by a slum of underemployed workers huddling under tarpaulins and drinking gin. For the most part he was not disappointed. But Mr. Threader with his genius for skirting, and his abhorrence of the center, teased Daniel by taking unmarked tracks through the woods and across meadows, opening gates and even taking down fence-rails as if he owned the place, and sniffing out the cottages and lodges where the Duke’s tame gentlemen kept records and counted coins. In glimpses between the trunks of trees (where trees still stood) or piles of timbers (where they didn’t) Daniel collected vague impressions of the Palace’s foundations, and some half-completed walls.

This divagation to Woodstock finally broke the ice-which had been very thick-between Dr. Waterhouse and Mr. Threader. It was clear that Daniel was as mysterious to Mr. Threader as the other way round. Since Threader had not been present at Crockern Tor-he had lain in wait for the Stannary Court at the Saracen’s Head-he’d not had the benefit of hearing Will Comstock’s account of the Plague Year. All Mr. Threader knew was that Daniel was a Royal Society chap. He could infer that Daniel had got in solely on account of his brains, as he was manifestly lacking in the other tickets: wealth and class.

In the early going, out in Devon where distances between fine houses were greater, Mr. Threader had not been able to restrain himself from circling round Daniel and jabbing at his outer defenses. He had somehow got it in his head that Daniel was connected to the family of Will Comstock’s bride. And to him this would make sense. Will had married the daughter of a Plymouth merchant who had grown wealthy importing wine from Portugal. But her great-grandfather had been a cooper. Will, by contrast, had noble blood, but no money. Such complementary marriages were all the rage now. Daniel was no gentleman; ergo, he must be some friend of the cooper’s folk. And so Mr. Threader had made certain dry, deadpan utterances about Will Comstock, hoping that Daniel would put his book down and unburden himself of some lacerating comments about the folly of using steam to do work. In the first few days’ travel he had bobbled such bait before Daniel, but his angling had been in vain. Since then, Daniel had kept busy reading in his books and Mr. Threader writing in his. Both men were of an age when they were in no great hurry to make friends and share confidences. Starting friendships, like opening up new overseas trade routes, was a mad venture best left to the young.

Still, from time to time, Mr. Threader would lob dry conversation-starters in Daniel’s direction. Just to be a good sport, Daniel would do the same. But neither man could accept the loss of face that attended curiosity. Daniel could not bring himself to come out and ask what Mr. Threader did for a living, as he could see that among the set who kept big houses in the country, it was perfectly obvious, and that only an idiot, or a grubby Whig, would not know. Mr. Threader, for his part, wanted to know how Daniel was connected to the Earl of Lostwithiel. To him, it was monstrously strange that an aged Natural Philosopher should materialize all of a sudden in the middle of Dartmoor, in a coonskin wrapper, and croak out a few words that would cause every gentleman in a twenty-mile radius to liquidate other holdings, and buy stock in that commercial Lunatick Asylum, the Proprietors of the Engine for Raising Water by Fire.

Daniel had developed two alternative hypotheses: Mr. Threader was a betting agent who roamed about taking and settling wagers. Or, Mr. Threader was a Jesuit in disguise, visiting the homes of crypto-Catholic Jacobite Tories to hear confessions and to collect tithes. The polished wooden chests, according to this hypothesis, contained communion wafers, chalices, and other Popish gear.