Sir John had ordered a shieldburg[[45]] to be formed around the young king and the clergymen, through which, however, many arrows pierced, while the stones and other missiles rattled on the bucklers with a frightful din. On the royal vessel there alighted such an enormous mass of stones, that it was evident the duke had concentrated his attack on it alone. A few men fell, and many were wounded; but the distance was still too great for these missiles to take much effect.

On board the king's ship, the standard-bearer now again waved the royal banner, and the entire fleet rowed rapidly forward, while the heavy engines of war were put in preparation. At the stern of the king's vessel was placed an immense prow-hog, which, with its spiked and sharp iron crest, broke into the centre of the duke's fleet, and, at the first blow, parted two long-ships, thus forcing the duke to fight his own vessel without aid from the others.

At the same instant, the sea-rams were vigorously worked. These consisted of heavy beams, cased in iron, which, suspended by chains from the masts, were swung with crushing effect against the enemies' vessels. The duke possessed no such heavy machines; and it was soon apparent that the royalists had gained a considerable advantage in this first assault, great confusion having been produced in the enemies' fleet, the line of which was already almost entirely broken.

It was, however, speedily evident that the lighter arms of the duke were not less dangerous. He seemed not yet desirous of boarding, but, with his light vessels, evaded the advancing line of heavy battle-ships; whilst, besides arrows, stones, and bolts, he continued to shower upon them great numbers of caltrops, and of fire-pots, filled with pitch, brimstone, and oil. The latter were set on fire with tow, and, as they fell, cast forth flames, which, seizing upon the sails and cordage, created great damage and confusion in the royal fleet.

The duke immediately availed himself of this to order an attack on its rear by his smaller vessels. When he heard, by the shouting, that this was in execution, and became sure that the royalists would have to fight in opposite directions and with divided strength he no longer avoided the attempt to board, but ran his own long-ship close up to that of the king.

Thorstenson, who had quickly perceived this cunning manœuvre, commanded the cables by which the royal ships were bound together to be immediately cut asunder, in order that he might secure a more advantageous position; but the caltrops had produced so much disorder, and the fire-pots taken such effect, that the men were fully occupied in extinguishing the flames, and in defending themselves against the boarders, who now threatened them on both sides.

In this extremity young Erik, who stood by the side of the chancellor, with his sword in one hand and a javelin in the other, observed the duke near him, preparing to leap on board the blazing vessel. The sight of the duke enraged him. "'Twas an unchivalrous piece of cunning, Duke Waldemar!" he cried, at the same time dashing at him his javelin, which struck the feather of the duke's helmet, and carried away its jewel.

At this a shout of delight broke forth on board the king's ship, and, abandoning their efforts to extinguish the fire, the whole crew rushed forward, to repulse the duke's boarders.

"Be calm, brave countrymen!" shouted Sir John. "Let us first quench the fire, and then reckon with them for our house-warming!"

Both fire and attack raged most fiercely at the prow, and the standard-bearer, forced to defend himself, had been obliged to fix the banner in a plank by his side, where it was soon caught by the flames, and fell hissing into the water. This incident, while it raised a wild shout of joy on board the duke's fleet, greatly disheartened the royalists, who regarded it as an unlucky omen.