McCullum had said, “I advise you to keep clear of the explosion.” Apparently the explosion of a barrel of powder, even far down under the water, created a turmoil on the surface that would endanger the gig. Beside the ship they would be a quarter of a mile away; that should be safe enough. When the bowman hooked on to the main chains of the Atropos, Hornblower looked at his watch again. It was exactly five minutes since he had seen the spark passing into the end of the fuse-hose. The explosion could be expected at any time from now.
Naturally the side of the ship was lined with every idler who could find a place there. The preparation of the charge and the fuse had excited gossip throughout the ship.
Hornblower changed his mind about awaiting the explosion in the gig and mounted to the deck.
“Mr. Jones!” he bellowed. “Is this a raree-show? Keep the hands at work, if you please.”
“Aye aye, sir.”
He very much wanted to see the explosion himself, but he feared to display curiosity inconsonant with his dignity. And there was the chance—a likely chance, according to McCullum—that there would be no explosion at all. A glance at his watch showed him that it was by now overdue. With an appearance of the utmost indifference he strolled forward to McCullum’s bedside, where McCullum was listening to the reports of his divers.
“Nothing as yet?” said McCullum.
“Nothing.”
“I never trust a fuse-hose beyond five fathoms,” said McCullum, “even when I handle it myself.”
Hornblower kept back an irritated answer, and gazed out towards the scene of his recent activities. In the choppy water he could just perceive at intervals the dark spot which was the keg that floated the end of the fuse-hose. He glanced at his watch again.
“Long overdue,” he said.
“Water’s in that hose. You’ll have to use a flying-fuse after all.”
“The sooner the better,” said Hornblower. “How do I set about it?”
He was glad for the sake of his precious dignity that he had not waited in sight of the men.
XV
This time so many men were wanted for the operation that Hornblower was using the launch instead of the gig. As usual the three Ceylonese divers were huddled in the bows, but next to them in the bottom of the boat stood an iron pot of melted pitch, and beside it squatted a sail-maker’s mate, and Mr. Clout, the gunner, sat amidships with the powder keg between his legs. The canvas covering to the keg was incompletely sewn, gaping wide at the upper end. They dropped the grapnel and the launch rode on the little waves beside the little keg that floated with the end of the useless fuse-hose, a monument to the previous failure.
“Carry on, Mr. Clout,” said Hornblower.
This was something more than exciting. This was dangerous. The divers stripped themselves for their work, and sat up to begin their exercises of inflating and deflating their lungs. There would not be any time to spare later. Clout took the tinderbox and proceeded to strike a spark upon the tinder, crouching low to shelter it from the small breeze which blew over the surface of the Bay. He caught fire upon the slow match, brought it to a glow, and looked over at Hornblower.
“Carry on, I said,” said Hornblower.
Clout dabbed the slow match upon the fuse that protruded through a hole in the end of the powder keg. Hornblower could hear the faint irregular hissing of the fuse as Clout waited for it to burn down into the hole. Among them now, in the middle of the boat, fire was creeping towards thirty pounds of gunpowder. If there were a few powder grains out of place, if the fuse were the least faulty, there would come a sudden crashing explosion which would blow them and the boat to fragments. There was not a sound in the boat save the hissing of the fuse. The spark crept down into the hole. The powder keg at this upper end had a double head, the result of the most careful work by the ship’s cooper. In the space between the two heads was coiled the fuse, whose farther end penetrated the inner head to rest amid the powder. Along that coil stapled to the inner head the fire was now moving unseen, creeping round on its way to dive down along its final length through the inner head.
Clout took from his pocket the canvas-covered stopper, and dipped it into the warm pitch.
“Make sure of it, Mr. Clout,” said Hornblower.
Clout rammed the stopper into the hole in the outer head. The action cut off the sound of the hissing fuse, but everyone in the boat knew that the fire was still pursuing its inexorable way inside. Clout smeared pitch thickly about the stopper and then moved out of the way.
“Now, my hearty,” he said to the sailmaker’s mate.
This last needed no urging. Needle and palm in hand, he took Clout’s place and sewed up the canvas cover over the top of the keg.
“Keep those stitches small,” said Hornblower; the sailmaker’s mate, crouching over instant death, was not unnaturally nervous. So was Hornblower, but the irritation caused by the previous failure made him anxious that the work should be well done.
The sailmaker’s mate finished the last stich, oversewed it, and, whipping out his sheath knife, cut the twine. There could be hardly anything more harmless in appearance than that canvas-covered keg. It looked a stupid, a brainless object, standing there in the boat. Clout was already daubing pitch over the newly-sewn end; the sides and the other end had been thickly pitched before the keg was put into the launch.
“Now the line,” said Hornblower.
As on the previous occasion a loop of line attached to the keg was passed round the mooring line of the buoy and secured to the keg again.
“Hoist it, you two. Lower away. Handsomely.”
The keg sank below the surface, dangling on the lowering line as the men let it down hand over hand. There was a sudden relief from tension in the boat, marked by a sudden babble of talk.
“Silence!” said Hornblower.
Even though the thing was invisible now, sinking down to the bottom of the Bay, it was still deadly—the men did not understand that. One of the divers was already sitting on the gunwale, a cannon-ball in his hands—that was a ridiculous moment for Hornblower to remember that he had not carried out his earlier resolution to get in a store of rocks for that purpose—and his chest expanding and contracting. Hornblower would have liked to tell him to make certain to place the powder keg to the best advantage, but that was impossible owing to the difficulties of language. He had to content himself with a glance, half encouragement and half threat.
“Bottom, sir,” announced the seaman at the lowering line.
The diver slipped from the gunwale and vanished under the surface. Down there with the powder charge and the glowing fuse he was in worse peril even than before. “They’ve seen one of their mates blown to bits using a flying fuse off Cuddalore,” McCullum had said. Hornblower wanted nothing like that to happen now. It occurred to him that if it were to happen the launch, with him in it, would be on top of the explosion and turmoil, and he wondered what was the mysterious force that always drove him into voluntarily taking part in dangerous adventures. He thought it must be curiosity, and then he realized that it was a sense of shame as well; and it never occurred to him that a sense of duty had something to do with it too.
The second diver was sitting on the gunwale, cannon-ball in hand and breathing deeply, and the moment the first diver’s head broke water he let himself slip down and vanished. “I’ve put the fear of God into ’em,” McCullum had said. “I’ve told ’em that if the charge explodes without being properly placed they’ll all get two dozen. An’ I’ve said we’re here to stay. No matter how long we try to get the money up. So you can rely on ’em. They’ll do their best.”
And they certainly were doing their best. Looney was waiting on the gunwale now, and down he went as soon as the second diver appeared. They wanted to waste no time at all. Not for the first time Hornblower peered overside in the attempt to see down through the water, unsuccessfully again. It was clear, and the loveliest deep green, but there was just sufficient lop and commotion on the surfa
ce to make it impossible to see down. Hornblower had to take it for granted that deep down below, in semi-darkness at least, and amid paralysing cold, Looney was dragging the powder charge towards the wreck and shoving it under the break of the poop. That powder keg under water could weigh little enough, thanks to the upthrust that Archimedes discovered, twenty centuries ago.
Looney reappeared, and the first diver instantly went down to replace him. This business was for the divers a gamble with life and death, a losing lottery. If the charge were to explode prematurely it would be chance that would dictate who would happen to be down there with it at that moment. But surely it could not take long to move the charge a few yards along the bottom and into the right place. And down there, he hoped, the fire was creeping along the coils of the fuse, sandwiched tight between the two barrel-heads. The philosophers had decided that fuses were able to burn in the absence of air—unlike candles—because the nitre that permeated the cord supplied the same combustible substance that air supplied. It was a discovery that went close to solving the problem of life—a human being’s life went out like a candle’s in the absence of air. It might be reasonably expected soon that the discovery might be made as to how to maintain life without air.
Yet another dive. The fire was hurrying along the fuse. Clout had allowed enough for an hour’s burning—it must not be too little, obviously, but also it must not be too much, for the longer the keg was exposed to the water pressure the greater the chance of a weak point giving way and water seeping in. But Clout had pointed out that in that confined space between the barrel-heads the heat would not be able to escape; it would grow hotter and hotter in there and the fuse would burn faster—the fire might even jump from one part of the coil to another. The rate of burning, in other words, was unpredictable.
The diver who had just appeared gave a sharp cry, in time to prevent the next one—Looney—from going down. An eager question and answer, and Looney turned to Hornblower with a waving of hands.
“Get that man on board,” ordered Hornblower. “Up anchor!”
A few strokes of the oars got the launch under weigh; the Ceylonese in the bows were chattering like sparrows at dawn.
“Back to the ship,” ordered Hornblower.
He would go straight on board without looking back once; he would not compromise his dignity by awaiting an explosion which might never come. The tiller was put over and the launch began her steady course towards Atropos.
And then it happened, while Hornblower’s back was turned to it. A sullen, muffled roar, not very loud, as if a gun had been fired in a distant cave. Hornblower swung round in his seat just in time to see a bulging wave overtake them, heaving up the stern of the launch. The stern sank and bow rose, the launch pitching violently, like a child’s toy boat in a tub. The water that surged round them was discoloured and dark. It was only for a few seconds that the violent commotion lasted, and then it passed on, leaving the launch rocking jerkily.
“She’s gone up, sir,” said Clout, quite unnecessarily.
The hands were chattering as much as the Ceylonese.
“Silence in the boat!” said Hornblower.
He was angry with himself because the unexpected sound had caused him to leap in his seat. He glowered at the men, and they fell into a hushed silence.
“Starboard your helm,” growled Hornblower. “Give way!”
The launch swung round and retraced its course towards the scene of the explosion, marked by a dirty patch of water. Half a dozen big bubbles rose to the surface and burst as he watched. Then something else came up, and something else, dead fish floating up to the surface, their white bellies gleaming under the sky. The launch passed one which was not quite dead; it was making feeble efforts, just perceptible, to right itself and descend again.
“Silence!” said Hornblower again—the irrepressible chatter had broken out again. “Easy!”
In silence the launch floated over the scene of the explosion. Dead fish, a stain, and nothing else. Nothing else at all. Hornblower felt a sick feeling of disappointment; there should be fragments from the wreck covering the surface, shattered bits of timber to show that the powder charge had done its work. The fact that there was none was proof that no gap had been blown in the wreck. His mind was racing into the future. Another charge with another flying fuse would have to be used, he supposed, and the most brutal threats would have to be employed towards the divers to make them put it into position. They had escaped the last explosion by not more than thirty seconds, he supposed, and they would be chary of running the risk again.
There was a bit of timber! No, it was the plank which had been used as a marker buoy.
“Haul in on that line,” said Hornblower to the man pulling stroke oar. There was only ten feet of line attached to the plank—the line had been broken at that point; so the explosion had effected something, at least. It was ironical that that was all—just a marker buoy torn loose.
“Put on another grapnel and line,” ordered Hornblower. They must still be close enough to the spot for the marker to be better than nothing.
Hornblower caught Looney’s eye; he seemed willing enough to all appearance. It would save time if an examination of the scant results were made now.
“Looney,” said Hornblower, and pointed overside. He had only to point a second time for Looney to nod his agreement and pull off his clothes again. As far as Hornblower could remember Looney had not yet made his daily quota of five dives yet. Looney inflated his chest and slipped in, and the launch lay drifting. The little waves that slapped against her sides had a different quality from usual; they had not even the small amount of system arising from the wind that agitated the surface—they seemed to come from all points at once. Hornblower realized that they were the last dying remnants of turbulence which the explosion had set up.
Up came Looney, his slender bundle of black hair bobbing beside his face. His white teeth showed in what might almost be thought to be a smile, except that of course he was gasping for breath. He struck out towards the launch, saying something to his colleagues as he did so which set them off twittering volubly. Apparently the explosion which had torn the marker buoy loose had not driven it any distance from its position. They hauled Looney on board into the bows. The chattering went on; now Looney was making his way aft over the thwarts and between the men. He was rubbing something in a portion of his clothing as he came—something which he put into Hornblower’s hand with a broad grin. Something disc-shaped and heavy, tarnished, encrusted, and yet—and yet—
“God bless my soul,” said Hornblower.
It was a shilling; Hornblower could only stare at it, and turn it over in his fingers. Every eye in the boat was directed at it; the men were quick enough to guess even if they could not see it clearly. Someone started to cheer, and the others took it up. Hornblower looked down the boat at the grinning faces. Even Clout was waving his hat and yelling.
“Silence!” shouted Hornblower. “Mr. Clout, you ought to be ashamed of yourself.”
But the noise did not stop instantly as before; the men were too excited. But it died away at length, and the men waited. Hornblower had to think now about the next move, completely at a loss—this development had taken him by surprise and he had no idea for the moment what to do next. It would have to be anti-climax, he decided at last. For the recovery of the treasure fresh equipment would be necessary; that was certain. The divers had made nearly as many dives that day as they could. Moreover, McCullum must be informed of the results of the explosion and his decision heard regarding further steps. Hornblower even realized that there was no certainty that subsequent operations would be easy. One shilling did not make a quarter of a million sterling. There might be much further work necessary.
“Oars!” he snapped at the waiting men. The oar-looms clattered into the rowlocks and the men bent forward ready to pull. “Give way!”
The oar-blades bit into the water and the launch slowly gathered way.
“Head for the s
hip!” he growled at the coxswain.
He sat glowing in the stern-sheets. Anyone seeing his face might well have thought that the launch was returning after a complete failure, but it was merely that he was annoyed with himself at not being quick-witted enough to have had the appropriate orders ready at once when that astonishing shilling was put into his hand. The whole boat’s crew had seen him at a loss. His precious dignity was hurt. When he got on board he was inclined to sulk in his cabin, but common sense made him go forward soon to discuss the situation with McCullum.
“There’s a cascade of silver,” said McCullum, who had been listening to the reports of the divers. “The bags have rotted, and when the treasure room was blown open the silver poured out. I think that’s clear enough.”
“And the gold?” asked Hornblower.
“Looney can’t tell me as yet,” said McCullum. “If I had been in the launch I daresay I should have acquired more information.”
Hornblower bit back an angry retort. Nothing would please McCullum better than a quarrel, and he had no wish to indulge him.
“At least the explosion served its purpose,” he said pacifically.
“Like enough.”
“Then why,” asked Hornblower—the question had been awaiting the asking for a long time—“if the wreck was blown open why didn’t wreckage come to the surface?”
“You don’t know?” asked McCullum in reply, clearly gratified at possessing superior knowledge.
“No.”
“That’s one of the elementary facts of science. Timber submerged at great depths soon becomes waterlogged.”
“Indeed?”
“Wood only floats—as I presume you know—by virtue of the air contained in the cavities in its substance. Under pressure that air is squeezed out, and, deprived of this upthrust, the residual material has no tendency to rise.”
“I see,” said Hornblower. “Thank you, Mr. McCullum.”
“I am accustomed by now,” said McCullum, “to supplementing the education of King’s officers.”