“Do the same rivers always spring up? Or is it new ones, in different places, at every tide?” Daniel mused.

“One will recur, again and again, for years, perhaps undergoing slow alterations from tide to tide,” Isaac answered.

“It was a rhetorical question,” Daniel muttered.

“Then some day, perhaps after a storm or an exceptional high tide, the water draws back, and it is gone, never to be seen again. There is much in the subterranean realm that is as opaque to the mind, as it is to the eye.”

Isaac now moved across the poop deck to view Shive Tor. Daniel felt compelled to stay at his elbow.

To their left, gray spread to infinity. Ahead, it extended only to the shore of the Isle of Grain, a couple of miles distant. Most of the isle barely rose above the horizon, but there was one hill, perhaps fifty to a hundred feet above sea level, grassy, with a few weather-shocked trees flinging their arms back aghast. Atop that stood a small, blocky, ancient stone church. It stood broadside to the sea, as if the masons had begun by erecting a wind-wall so that they would have something to stand in the lee of, then topped it with a steep roof to deflect the gales heavenwards. On its western front was a square tower with a flat roof and a crenellated top, which the Black Torrent Guard had pressed into service as a watch-tower.

Between Atalanta and the foot of that hill, the gray expanse was divided into an upper and a lower part by an irregular line of heaving froth. Below, this was tinged with blue and aqua. Above-nearer the land-it was washed with brownish and yellowish and greenish hues and mottled by scattered swellings in the mud. Sea-birds skimmed along just above it, moving in twos and threes as if hanging together for safety. From time to time they would alight and skitter about on twiglike legs, pecking at the mud. Some of them were doing so around the very foundations of Shive Tor, which stood high, but not dry, halfway between Atalanta and the foot of the hill.

The Tor’s dredged ship-channel was aimed obliquely downriver, so to find its entrance Atalanta would have to glide a short distance past the Shive and come about. The sailors were making ready to accomplish that and to launch the longboat, and they were going about it smartly, for it now seemed quite possible that they might lose the fleeing whaler in the dark. A silver-greyhound flag had been produced from somewhere and was being lashed to a stunted flagpole on the longboat’s transom, so that, for what it was worth, everyone who saw them would know that they were the Queen’s Messengers. Two dragoons had been pressed into service throwing sounding-leads over the rail and calling out depths, one on the port and one on the starboard side of the bow.

Barnes was arguing with the sloop’s captain as to which of them would need more dragoons. The latter wanted it understood that this was Mr. Charles White’s pleasure-jacht, not an Admiralty ship, and that, in consequence, he did not have any Marines aboard; and as the fleeing whaler probably contained the leaders of Jack’s organization-possibly even Jack himself-at any rate, the most notorious and dangerous criminal traitors in the Realm-most of the dragoons really ought to remain aboard the sloop.

“But you are overhauling a single boat,” Barnes was saying. “We are assaulting a stone fortress. There’s no telling what we shall find-”

But it was useless. Charles White-who would be staying on the sloop, that he might have the glory of catching Jack the Coiner-came down on his captain’s side, and pointed out that Barnes’s party would in a few minutes be reinforced by nearly a full company of dragoons charging across from the Isle of Grain. The number of dragoons put off in the longboat, not including Colonel Barnes and Sergeant Shaftoe, would be eight. If that was not enough, they could always draw back and await the onslaught from shore.

“It is like playing a part in a masque,” Daniel heard Barnes muttering, “a farce entitled ‘How bad plans are made.’ ”

“If Jack understood the true nature of the Solomonic Gold, he would not use it to coin false guineas,” Isaac said to Daniel, apparently feeling some need to justify his tactics aloud. “To him it is only gold. Slightly above common gold in value, but still gold. Finding himself under attack, he would get it out of the Tor and aboard the hooker. But when the hooker ran aground, he would resolve to abandon it. For he would have other hoards elsewhere.”

“You think he threw it overboard?”

“The band of criminals on the hooker, in their panic, might have thrown anything heavy overboard. So we might find it strewn along the bank of the dredged channel. Or it might still be aboard the hooker. I don’t think it is in the Tor, or on the whaler-come! It’s now!” And Isaac moved with short quick steps to the head of the stair that ran down to the upperdeck. His box of gear was slung over his shoulder on a leather strap, and it banged on his hip as he went, and threatened to pull him off balance. Daniel scurried up behind him and put a steadying hand on the box, and in this way the two old philosophers moved down the steps and across to where the longboat was a-dangle from a pair of out-thrust yards. Soon enough they, Barnes, Shaftoe, eight dragoons, and an able seaman from the sloop’s crew were aboard; though Daniel nearly toppled into the water, and in the scramble, lost his periwig. Lines were worked, and the boat jostled and slanted beneath them. They fell into the looming shadow of the sloop’s hull. Between the darkness and the loss of his wig, Daniel felt chilly, and called for someone to throw a blanket down to him. Soon a wadded-up lump of gray wool thudded down, followed by a knit watchman’s cap, which Daniel gratefully pulled down over his naked skull. As the sloop pulled away from them he saw his wig spinning in a vortex, its long white ponytail pointing this way and that, like a compass needle that has lost its fix on true north.

The sloop-which seemed to move so slowly when one was aboard-sprang away from them. Or perhaps it only felt that way to one who was being marooned. Within a minute they were beyond shouting-range, and might signal the larger vessel only by having a dragoon fire a musket into the air.

The platoons on the Isle of Grain were not moving nearly so quickly. When this plan had first been conceived, Daniel had phant’sied that Atalanta, and those mounted platoons, would converge on the Tor at the same instant. But here they were in this longboat at the mouth of the dredged channel, perhaps a musket-shot from the Tor, and the companies on the isle had not stirred yet. Supposedly they were at the foot of the hill, below the steeple of the church. But they were hidden in the dusky shadows, and obscured by grass. That they existed at all was merely a comforting assumption, like that there was a God and that He meant well.

And so for a moment Daniel, and everyone else on the boat with the probable exception of Isaac, were overcome with the sense that it was all a terrible mistake.

Then they could hear the faint sound of a horse blowing air through its lips, out somewhere along the shore. Then faint crackling sounds that came and went in pulses. For the isle was belted with a strand of cockleshells rejected by the surf, and some men must be treading on them as they came down on to the tide flats.

“Let’s go for a bit of a row then,” Barnes said. “I’ll wager Jack has some claret inside.” He addressed these words to Bob Shaftoe, who bellowed something to his dragoons who were manning the oars. And rowing boats might not have been their metier; but they applied themselves to it cheerfully enough and began bashing their oars against each other. “Move some bloody water!” Bob told them. “This ain’t duelling with quarter-staves. Do I look like Robin bloody Hood to you? Stop banging ’em together and get ’em in the water!” And much more in that vein as the longboat began to spin and dodge forward across the pale water that lay thin on the mud-bank. They had crossed over the surf-line now, and the foam of the breakers looked as if it were above their altitude. This illusion was mildly unnerving even to Daniel, who had the advantage of being in a boat; it could not have been comforting to the approaching dragoons.