The name, whatever its origin, was long current in the Spanish as "filibustero" before it became adopted into the English. So adopted, it has been used to describe a type of adventurer who occupied a curious place in American history during the decade from 1850 to 1860. The citizen or subject of any country, who makes war upon a state with which his own is at peace, with intent to overrun and occupy it, not merely for the piratical ends of rapine and plunder, is a filibuster in the true sense of the term. Such act of war is, by the law of nations, a crime against both countries. Its morality, before the meaner court of popular judgment, will rest upon the measure of its success alone. So judged, as all invaders are judged at last, the bold adventurer draws but few prizes in the lottery of fame. Cortez and Houston are among the few successful filibusters of modern times. In the shadowy chronicles of the Norsemen we find the first trace of that adventurous spirit which, during twelve centuries, gave the dominion of the ocean to the seafaring people of Northern Europe. The bold Vikings who, without chart or compass, sailed over unknown and dangerous seas, crossed the Atlantic and swept the Mediterranean, were the worthy fathers of the Drakes and Ansons of later years. History bespeaks them cruel, rapacious, daring; pirates when, as Wheaton says, the occupation of a pirate was considered not only lawful, but honourable. But they were not wholly destructive. Borrowing a lesson in natural history from their own lemming, they solved the troublesome problem, how to get rid of a surplus population, by sending the superfluous members forth to seek a new field. The lemming eats his way to the sea, in which he finds his grave; but his human imitator more wisely found there a pathway to fortune. They went forth mainly to conquer, incidentally to colonize and settle. Among themselves they were primitive republicans, though harsh tyrants to their vanquished foes. "Who is your king or leader?" asked the herald of King Charles the Simple, before the decisive battle on the banks of the Eure in A.D. 898. "We have no king, no chief, no master; but 'Rolf, the Walker,' leads us in war and on the day of battle," was the proud answer of Rolf's comrades and peers. That this was no idle boast, Rolf's own descendant, King John of England, learned to his sorrow when the sons of the sturdy Norse filibusters met him face to face at Runnymede. The Magna Charta is the written code of that fierce democracy, dreaded alike by its serfs and its kings. The Vikings stand alone as a race of warriors whose hardihood overcame even their native superstition, in leading them to defy the gods themselves. They were sceptics, because they knew not fear. Love was as yet an unknown power in their religion.