The British Vice-Admiral did not intend to remain in this quiescent condition. It was, of course, useless to order forth his ironclads, simply to see them disabled and set adrift. There was another arm of the service which evidently could be used with better effect upon this peculiar foe than could the great battle-ships.

But before doing anything else, he must provide for the safety of those of his vessels which had been rendered helpless by the crabs, and some of which were now drifting dangerously near to each other. Despatches had been sent to Portsmouth for tugs, but it would not do to wait until these arrived, and a sufficient number of ironclads were detailed to tow their injured consorts into port.

When this order had been given, the Vice-Admiral immediately prepared to renew the fight, and this time his efforts were to be directed entirely against the repeller. It would be useless to devote any further attention to the crabs, especially in their present positions. But if the chief vessel of the Syndicate's fleet, with its spring armour and its terrible earthquake bombs, could be destroyed, it was quite possible that those sea-parasites, the crabs, could also be disposed of.

Every torpedo-boat was now ordered to the front, and in a long line, almost abreast of each other, these swift vessels—the light-infantry of the sea—advanced upon the solitary and distant foe. If one torpedo could but reach her hull, the Vice-Admiral, in spite of seven disabled ironclads and a captured gun-boat, might yet gaze proudly at his floating flag, even if his own ship should be drifting broadside to the sea.

The line of torpedo-boats, slightly curving inward, had advanced about a mile, when Repeller No. 11 awoke from her seeming sleep, and began to act. The two great guns at her bow were trained upward, so that a bomb discharged from them would fall into the sea a mile and a half ahead. Slowly turning her bow from side to side, so that the guns would cover a range of nearly half a circle, the instantaneous motor-bombs of the repeller were discharged, one every half minute.

One of the most appalling characteristics of the motor-bombs was the silence which accompanied their discharge and action. No noise was heard, except the flash of sound occasioned by the removal of the particles of the object aimed at, and the subsequent roar of wind or fall of water.

As each motor-bomb dropped into the channel, a dense cloud appeared high in the air, above a roaring, seething cauldron, hollowed out of the waters and out of the very bottom of the channel. Into this chasm the cloud quickly came down, condensed into a vast body of water, which fell, with the roar of a cyclone, into the dreadful abyss from which it had been torn, before the hissing walls of the great hollow had half filled it with their sweeping surges. The piled-up mass of the redundant water was still sending its maddened billows tossing and writhing in every direction toward their normal level, when another bomb was discharged; another surging abyss appeared, another roar of wind and water was heard, and another mountain of furious billows uplifted itself in a storm of spray and foam, raging that it had found its place usurped.

Slowly turning, the repeller discharged bomb after bomb, building up out of the very sea itself a barrier against its enemies. Under these thundering cataracts, born in an instant, and coming down all at once in a plunging storm; into these abysses, with walls of water and floors of cleft and shivered rocks; through this wide belt of raging turmoil, thrown into new frenzy after the discharge of every bomb,—no vessel, no torpedo, could pass.

The air driven off in every direction by tremendous and successive concussions came rushing back in shrieking gales, which tore up the waves into blinding foam. For miles in every direction the sea swelled and upheaved into great peaked waves, the repeller rising upon these almost high enough to look down into the awful chasms which her bombs were making. A torpedo-boat caught in one of the returning gales was hurled forward almost on her beam ends until she was under the edge of one of the vast masses of descending water. The flood which, from even the outer limits of this falling-sea, poured upon and into the unlucky vessel nearly swamped her, and when she was swept back by the rushing waves into less stormy waters, her officers and crew leaped into their boats and deserted her. By rare good-fortune their boats were kept afloat in the turbulent sea until they reached the nearest torpedo-vessel.

Five minutes afterward a small but carefully aimed motor-bomb struck the nearly swamped vessel, and with the roar of all her own torpedoes she passed into nothing.