After this there arose within the hall the din of voices and the sound of song; the instruments also were brought out and Hrothgar's minstrel sang a ballad for the delight of the warriors. Waltheow too came forth, bearing in her train presents for Beowulf—a cup, two armlets, raiment and rings, and the largest and richest collar that could be found in all the world.

Now when evening came Hrothgar departed to his rest, and the warriors cleared the hall and lay down to sleep once more, with their shields and armor beside them as was their custom. But Beowulf was not with them, for another resting-place had been assigned to him that night, for all thought that there was now no longer any danger to be feared.

But in this they were mistaken, as they soon learnt to their cost. For no sooner were they all asleep than Grendel's mother, a monstrous witch who dwelt at the bottom of a cold mere, came to Heorot to avenge her son and burst into the hall. The thanes started up in terror, hastily grasping their swords; but she seized upon Asher, the most beloved of Hrothgar's warriors, who still lay sleeping, and bore him off with her to the fens, carrying also with her Grendel's arm, which lay at one end of the hall.

Then there arose an uproar and the sound of mourning in Heorot. In fierce and gloomy mood Hrothgar summoned Beowulf and told him the ghastly tale, begging him, if he dared, to go forth to seek out the monster and destroy it.

Full of courage, Beowulf answered with cheerful words, promising that Grendel's mother should not escape him; and soon he was riding forth fully equipped on his quest, accompanied by Hrothgar and many a good warrior. They were able to follow the witch's tracks right through the forest glades and across the gloomy moor, till they came to a spot where some mountain trees bent over a hoar rock, beneath which lay a dreary and troubled lake; and there beside the water's edge lay the head of Asher, and they knew that the witch must be at the bottom of the water.

Full of grief, the warriors sat down, while Beowulf arrayed himself in his cunningly fashioned coat of mail and his richly ornamented helmet. Then he turned to Hrothgar and spoke a last word to him.

“If the fight go against me, great chieftain, be thou a guardian to my thanes, my kinsmen and my trusty comrades; and send thou to Higelac those treasures that thou gavest me, that he may know thy kindness to me. Now will I earn glory for myself, or death shall take me away.”

So saying, he plunged into the gloomy lake, at the bottom of which was Grendel's mother. Very soon she perceived his approach, and rushing forth, grappled with him and dragged him down to her den, where many horrible sea-beasts joined in the fight against him. This den was so fashioned that the water could not enter it, and it was lit by the light of a fire that shone brightly in the midst of it.

And now Beowulf drew his sword and thrust at his terrible foe; but the weapon could not injure her, and he was forced to fling it away and trust in the powerful grip of his arms as he had done with Grendel. Seizing the witch, he shook her till she sank down on the ground; but she quickly rose again and requited him with a terrible hand-clutch, which caused Beowulf to stagger and then fall. Throwing herself upon him, she seized a dagger to strike him; but he wrenched himself free and once more stood upright.

Then he suddenly perceived an ancient sword hanging upon the wall of the den, and seized it as a last resource. Fierce and savage, but well-nigh hopeless, he struck the monster heavily upon the neck with it. Then, to his joy, the blade pierced right through her body and she sank down dying.