"Out oars!" he cried; "pull, war-birds! Pull all, as if ye were for Norway!" Forward and backward swayed the stout Norse rowers; tighter and tighter pulled the cables; fast down upon the straining war-ships rained the Danish spears and stones; but the wooden piles under the great bridge were loosened by the steady tug of the cables, and soon with a sudden spurt the Norse war-ships darted down the river, while the slackened cables towed astern the captured piles of London Bridge. A great shout went up from the besiegers, and "now," says the chronicle, "as the armed troops stood thick upon the bridge, and there were likewise many heaps of stones and other weapons upon it, the bridge gave way; and a great part of the men upon it fell into the river, and all the others fled--some into the castle, some into Southwark." And before King Ethelred, "The Unready," could pull his ships to the attack, young Olaf's fighting-men had sprung ashore, and, storming the Southwark earthworks, carried all before them, and the battle of London Bridge was won. And the young Olaf's saga-man sang triumphantly: "London Bridge is broken down-- Gold is won and bright renown; Shields resounding, War-horns sounding, Hildar shouting in the din! Arrows singing, Mail-coats ringing, Odin makes our Olaf win!" And perhaps, who knows, this wrecking of London Bridge so many hundred years ago by Olaf, the boy viking of fifteen, may have been the origin of the old song-game dear to so many generations of children: "London Bridge is fallen down, fallen down, fallen down-- London Bridge is fallen down, my fair lady!" So King Ethelred won back his kingdom, and the boy viking was honored above all others. To him was given the chief command in perilous expeditions against the Danes, and the whole defence of all the coast of England. North and south along the coast he sailed with all his war-ships, and the Danes and Englishmen long remembered the dashing but dubious ways of this young sea-rover, who swept the English coast and claimed his dues from friend and foe alike. For those were days of insecurity for merchant and trader and farmer, and no man's wealth or life was safe except as he paid ready tribute to the fierce Norse allies of King Ethelred. But soon after this, King Ethelred died, and young Olaf, thirsting for new adventures, sailed away to the south and fought his way all along the French coast as far as the mouth of the river Garonne. Many castles he captured; many rival vikings subdued; much spoil he gathered; until at last his dragon-ships lay moored under the walls of old Bordeaux, waiting for fair winds to take him around to the Straits of Gibraltar, and so on "to the land of Jerusalem." One day, in the booty-filled "fore-hold" of his dragon-ship, the young sea-king lay asleep; and suddenly, says the old record, "he dreamt a wondrous dream."