The order of full speed ahead was given, the fleet sprang through the air like coursing greyhounds, and in another moment the ships of the enemy were in full view. They formed a ragged line as far as the eye could reach in either direction and about three ships deep. So sudden was our onslaught that they had no time to prepare for it. It was as unexpected as lightning from a clear sky.

Every phase of my plan worked splendidly. Our huge ships mowed their way entirely through the line of thern battlecraft; then the V opened up and a broad lane appeared through which the transports leaped toward the temples of the therns which could now be plainly seen glistening in the sunlight. By the time the therns had rallied from the attack a hundred thousand green warriors were already pouring through their courts and gardens, while a hundred and fifty thousand others leaned from low swinging transports to direct their almost uncanny marksmanship upon the thern soldiery that manned the ramparts, or attempted to defend the temples.

Now the two great fleets closed in a titanic struggle far above the fiendish din of battle in the gorgeous gardens of the therns. Slowly the two lines of Helium's battleships joined their ends, and then commenced the circling within the line of the enemy which is so marked a characteristic of Barsoomian naval warfare.

Around and around in each other's tracks moved the ships under Kantos Kan, until at length they formed nearly a perfect circle. By this time they were moving at high speed so that they presented a difficult target for the enemy. Broadside after broadside they delivered as each vessel came in line with the ships of the therns. The latter attempted to rush in and break up the formation, but it was like stopping a buzz saw with the bare hand.

From my position on the deck beside Kantos Kan I saw ship after ship of the enemy take the awful, sickening dive which proclaims its total destruction. Slowly we manoeuvered our circle of death until we hung above the gardens where our green warriors were engaged. The order was passed down for them to embark. Then they rose slowly to a position within the centre of the circle.

In the meantime the therns' fire had practically ceased. They had had enough of us and were only too glad to let us go on our way in peace. But our escape was not to be encompassed with such ease, for scarcely had we gotten under way once more in the direction of the entrance to Omean than we saw far to the north a great black line topping the horizon. It could be nothing other than a fleet of war.

Whose or whither bound, we could not even conjecture. When they had come close enough to make us out at all, Kantos Kan's operator received a radio-aerogram, which he immediately handed to my companion. He read the thing and handed it to me.

"Kantos Kan: " it read. "Surrender, in the name of the Jeddak of Helium, for you cannot escape," and it was signed, "Zat Arras."

The therns must have caught and translated the message almost as soon as did we, for they immediately renewed hostilities when they realized that we were soon to be set upon by other enemies.

Before Zat Arras had approached near enough to fire a shot we were again hotly engaged with the thern fleet, and as soon as he drew near he too commenced to pour a terrific fusillade of heavy shot into us. Ship after ship reeled and staggered into uselessness beneath the pitiless fire that we were undergoing.

The thing could not last much longer. I ordered the transports to descend again into the gardens of the therns.

"Wreak your vengeance to the utmost," was my message to the green allies, "for by night there will be none left to avenge your wrongs."

Presently I saw the ten battleships that had been ordered to hold the shaft of Omean. They were returning at full speed, firing their stern batteries almost continuously. There could be but one explanation. They were being pursued by another hostile fleet. Well, the situation could be no worse. The expedition already was doomed. No man that had embarked upon it would return across that dreary ice cap. How I wished that I might face Zat Arras with my longsword for just an instant before I died! It was he who had caused our failure.

As I watched the oncoming ten I saw their pursuers race swiftly into sight. It was another great fleet; for a moment I could not believe my eyes, but finally I was forced to admit that the most fatal calamity had overtaken the expedition, for the fleet I saw was none other than the fleet of the First Born, that should have been safely bottled up in Omean. What a series of misfortunes and disasters! What awful fate hovered over me, that I should have been so terribly thwarted at every angle of my search for my lost love! Could it be possible that the curse of Issus was upon me! That there was, indeed, some malign divinity in that hideous carcass! I would not believe it, and, throwing back my shoulders, I ran to the deck below to join my men in repelling boarders from one of the thern craft that had grappled us broadside. In the wild lust of hand-to-hand combat my old dauntless hopefulness returned. And as thern after thern went down beneath my blade, I could almost feel that we should win success in the end, even from apparent failure.

My presence among the men so greatly inspirited them that they fell upon the luckless whites with such terrible ferocity that within a few moments we had turned the tables upon them and a second later as we swarmed their own decks I had the satisfaction of seeing their commander take the long leap from the bows of his vessel in token of surrender and defeat.

Then I joined Kantos Kan. He had been watching what had taken place on the deck below, and it seemed to have given him a new thought. Immediately he passed an order to one of his officers, and presently the colours of the Prince of Helium broke from every point of the flagship. A great cheer arose from the men of our own ship, a cheer that was taken up by every other vessel of our expedition as they in turn broke my colours from their upper works.

Then Kantos Kan sprang his coup. A signal legible to every sailor of all the fleets engaged in that fierce struggle was strung aloft upon the flagship.

"Men of Helium for the Prince of Helium against all his enemies," it read. Presently my colours broke from one of Zat Arras' ships. Then from another and another. On some we could see fierce battles waging between the Zodangan soldiery and the Heliumetic crews, but eventually the colours of the Prince of Helium floated above every ship that had followed Zat Arras upon our trail-only his flagship flew them not.

Zat Arras had brought five thousand ships. The sky was black with the three enormous fleets. It was Helium against the field now, and the fight had settled to countless individual duels. There could be little or no manoeuvering of fleets in that crowded, fire-split sky.

Zat Arras' flagship was close to my own. I could see the thin features of the man from where I stood. His Zodangan crew was pouring broadside after broadside into us and we were returning their fire with equal ferocity. Closer and closer came the two vessels until but a few yards intervened. Grapplers and boarders lined the contiguous rails of each. We were preparing for the death struggle with our hated enemy.

There was but a yard between the two mighty ships as the first grappling irons were hurled. I rushed to the deck to be with my men as they boarded. Just as the vessels came together with a slight shock, I forced my way through the lines and was the first to spring to the deck of Zat Arras' ship. After me poured a yelling, cheering, cursing throng of Helium's best fighting-men. Nothing could withstand them in the fever of battle lust which enthralled them.

Down went the Zodangans before that surging tide of war, and as my men cleared the lower decks I sprang to the forward deck where stood Zat Arras.