Central America and the West Indies might be in a turmoil, but there was no particular strategic point there (as he well knew after so much pondering about it) inviting an invasion by the Imperial Guard in uniforms and bearskins. It must be St. Helena, and then France. He could have no doubt about it now. Now the lives of millions, the peace of the whole world, depended on the decisions he had to make at this moment.

There was a rush of feet on the deck just above his head. He heard ropes slapping down upon it, orders being given, loud creakings. The cabin suddenly leaned over sideways with the setting of sail, catching him completely unaware, so that he staggered and dropped the bearskin cap, which lay unnoticed at his feet. Crab rose to an even keel again. The deck under his feet felt suddenly lively, as if the breath of life had been breathed into it. They were at sea; they were heading for Corpus Christi. With the wind east by north Crab would be running wing-and-wing, possibly. Now he had to think fast, with every second of value. He could not afford to run to leeward in this fashion if he were going to change his plans.

And he knew he was going to change them. He had yearned so desperately for a chance to guess whither Daring would head after calling at Corpus Christi. Now he could intervene. Now he had a chance to preserve the peace of the world. With his eyes, unseeing, focused upon an infinite distance, he stood in the swaying cabin calling up into his mental sight the charts of the Gulf of Mexico and the Caribbean. The North-east Trades blew across them, not quite as reliably at this time of year as during the winter, but constantly enough to be a calculable factor. A ship bound for the South Atlantic—for St. Helena—from Corpus Christi would be bound to take the Yucatan Channel. Then—especially if her business were such as not to invite attention—she would head for the shoulder of South America, down the centre of the Caribbean, with scores of miles of open sea on either beam. But she would have to pass through the chain of the Antilles before breaking through into the Atlantic.

There were a hundred passages available, but only one obvious one, only one route that would be considered for a moment by a captain bound for St. Helena and with the trade winds to contend with. He would round Galera Point, the northernmost extremity of Trinidad. He would give it as wide a berth as possible, but he could not give it a very wide berth because to the northward of Galera Point lay the island of Tobago, and the Tobago Channel between the two was no more than—Hornblower could not be sure exactly—certainly no more than fifty miles wide. In favourable conditions a single ship could patrol that channel and make certain that nothing passed through unsighted. It was a typical example of maritime strategy on a tiny scale. Sea power made its influence felt all over the wide oceans, but it was in the narrow seas, at the focal points, that the decisive moments occurred. The Yucatan Channel would not be nearly as suitable as the Tobago Channel, for the former was more than a hundred miles wide. Crab would get there first; that could be taken for granted seeing that Daring would have two sides of a triangle to cover, calling at Corpus Christi, and with a long beat to windward as a result. It would be best to employ the advantage so gained to hasten to the Tobago Channel. There would be just time to anticipate Daring there—just time—and there was a substantial chance that on the way he might meet some ship of his squadron, to take her along with him. A frigate, now. That would give him all the force he needed. He made his resolve at that moment, conscious as he did so of his quickened heartbeat.

“Giles!” shouted Hornblower.

Giles reappeared, and within the wide discretion of a spoiled servant displayed shocked disapproval at the sight of him still in his wet shirt and ducks.

“My compliments to Mr. Harcourt, and I would be glad to see him here as quickly as is convenient to him.”

That was very quickly, naturally, when an Admiral needed the presence of a lieutenant.

“Mr. Harcourt, I have decided on a change of plan. There is no time to be lost. Kindly set a course for Cape San Antonio.”

“Cape San Antonio. Aye aye, sir.”

Harcourt was a good officer. There was neither surprise nor doubt in his voice as he heard the surprising order.

“When we are on the new course I will explain what I intend to do, if you will have the goodness to report to me with the charts, Mr. Harcourt. Bring Mr. Gerard with you.”

“Aye aye, sir.”

Now he could take off his wet shirt and trousers, and dab himself dry with a towel. Somehow the little cabin did not seem so oppressively hot; perhaps because they were out at sea, perhaps because he had reached a decision. He was putting on his trousers at the moment when Harcourt had the helm put down. Crab came round like a top, with lusty arms hauling in on the sheets. She lay far over to starboard, with the wind abeam, and Hornblower, one leg in his trousers, after a frantic hop, trying to preserve his balance, fell on his nose across his cot with his legs in the air. He struggled to his feet again; Crab still heeled over to starboard, farther and then less, as each roller of the beam sea passed under her, each roll taking Hornblower by surprise as he tried to put his other leg into his trousers so that he sat down twice, abruptly, on his coat before he managed it. It was as well that Harcourt and Gerard re-entered the cabin only after he had succeeded. They listened soberly while Hornblower told them of his deductions regarding Daring’s plans and of his intention to intercept her at the Tobago Channel; Harcourt took his dividers and measured off the distances, and nodded when he had finished.

“We can gain four days on her to San Antonio, My Lord,” he said. “That means we’ll be three days ahead of her there.”

Three days should be just enough start for Crab in the long, long race down the length of the Caribbean.

“Could we call at Kingston on our way, My Lord?” asked Gerard.

It was tempting to consider it, but Hornblower shook his head. It would be no use calling at headquarters, telling the news, possibly picking up reinforcements, if Daring slipped past them as they were doing so.

“It would take too long to work in,” he said. “Even if we had the sea breeze. And there would be delay while we were there. We’ve nothing to spare as it is.”

“I suppose not, My Lord,” agreed Gerard, grudgingly. He was playing the part of the staff officer, whose duty it was to be critical of any suggested plan. “Then what do we do when we meet her?”

Hornblower met Gerard’s eyes with a steady glance; Gerard was asking the question that had been already asked and left unanswered.

“I am forming plans to meet that situation,” said Hornblower, and there was a rasping tone in his voice which forbade Gerard to press the matter.

“There’s not more than twenty miles of navigable water in the Tobago Channel, My Lord,” said Harcourt, still busy with his dividers.

“Then she can hardly pass us unobserved even by night,” said Hornblower. “I think, gentlemen, that we are acting on the best possible plan. Perhaps the only possible plan.”

“Yes, My Lord,” said Harcourt; his imagination was hard at work. “If Boney once gets loose again—”

He could not go on. He could not face that appalling possibility.

“We have to see to it that he does not, gentlemen. And now that we have done all that we can it would be sensible if we took some rest. I don’t think any one of us has had any sleep for a considerable time.”

That was true. Now that he had made up his mind upon a course of action, now that he was committed to it, for good or ill, Hornblower felt his eyelids drooping and sleep overcoming him. He lay down on his cot after his officers had left him. With the wind on the port beam and the cot against the bulkhead to starboard he could relax completely with no fear of rolling out. He closed his eyes. Already he had begun to form the answer to the question Gerard had asked. The answer was a hideous one, something horrible to contemplate. But it seemed to be inevitable. He had his duty to do, and now he could be sure that he was doing it to the best of his ability. With his conscience clear, with a reassuring certainty that he was using the best of his judgment, the inevitability of the rest of the future reinforced his need for sleep. He slept until dawn; he even dozed for a few minutes after that, before he began to think clearly enough again in the daylight for that horrible thought to begin to nag at him again.