We mentioned his occasional copartneries with Svein of the Double-beard, now become King of Denmark, but the greatest of these, and the alone interesting at this time, is their joint invasion of England, and Tryggveson's exploits and fortunes there some years after that adventure of baptism in the Scilly Isles. Svein and he "were above a year in England together," this time: they steered up the Thames with three hundred ships and many fighters; siege, or at least furious assault, of London was their first or main enterprise, but it did not succeed. The Saxon Chronicle gives date to it, A.D. 994, and names expressly, as Svein's co-partner, "Olaus, king of Norway,"--which he was as yet far from being; but in regard to the Year of Grace the Saxon Chronicle is to be held indisputable, and, indeed, has the field to itself in this matter. Famed Olaf Tryggveson, seen visibly at the siege of London, year 994, it throws a kind of momentary light to us over that disastrous whirlpool of miseries and confusions, all dark and painful to the fancy otherwise! This big voyage and furious siege of London is Svein Double-beard's first real attempt to fulfil that vow of his at Father Blue-tooth's "funeral ale," and conquer England,--which it is a pity he could not yet do. Had London now fallen to him, it is pretty evident all England must have followed, and poor England, with Svein as king over it, been delivered from immeasurable woes, which had to last some two-and-twenty years farther, before this result could be arrived at. But finding London impregnable for the moment (no ship able to get athwart the bridge, and many Danes perishing in the attempt to do it by swimming), Svein and Olaf turned to other enterprises; all England in a manner lying open to them, turn which way they liked. They burnt and plundered over Kent, over Hampshire, Sussex; they stormed far and wide; world lying all before them where to choose. Wretched Ethelred, as the one invention he could fall upon, offered them Danegelt (16,000 pounds of silver this year, but it rose in other years as high as 48,000 pounds); the desperate Ethelred, a clear method of quenching fire by pouring oil on it! Svein and Olaf accepted; withdrew to Southampton,--Olaf at least did,--till the money was got ready. Strange to think of, fierce Svein of the Double-beard, and conquest of England by him; this had at last become the one salutary result which remained for that distracted, down-trodden, now utterly chaotic and anarchic country. A conquering Svein, followed by an ably and earnestly administrative, as well as conquering, Knut (whom Dahlmann compares to Charlemagne), were thus by the mysterious destinies appointed the effective saviors of England.