The water-demon Grendel and the dragon (probably), by whom Beowulf is mortally wounded, have been supposed to represent the powers of autumn and darkness, the floods which at certain seasons overflow the low-lying countries on the coast of the North Sea and sweep away all human habitations; Beowulf is the hero of spring and light who, after overcoming the spirit of the raging waters, finally succumbs to the dragon of approaching winter.
Beowulf, with fourteen companions, sails to Denmark, to offer his help to Hrothgar, king of the Danes, whose hall (called " Heorot ") has for twelve years been rendered uninhabitable by the ravages of a devouring monster (apparently in gigantic human shape) called Grendel, a dweller in the waste, who used nightly to force an entrance and slaughter some of the inmates.
When all but Beowulf are asleep, Grendel enters, the iron-barred doors having yielded in a moment to his hand.
Grendel, though mortally wounded, breaks from the conqueror's grasp, and escapes from the hall.
In the vault he finds the corpse of Grendel; he cuts off the head, and brings it back in triumph.
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