Grettir said nothing, but as his gaiter thong became broken, he stopped and stooped to mend it. Thorgils asked if they should wait for him. Grettir declined.
"Oh," said Biorn, "it is all nonsense. It is a pretence. He means to have all the glory of fighting the bear alone when we have gone on."
He said the truth, but he had no idea when he spoke that it was the truth.
Grettir tarried till the party had crossed a hill and was out of sight, then he turned and went back to the bear's den. He slipped his hand through the loop at the end of the handle of his short sword that he had taken from the grave of Karr the Old, and let it hang on his wrist, but he held the long sword, Jokull's gift, by the pommel. His plan was to use the long sword if needed, but if the bear came to close quarters he would throw it down and grasp the short one without having to put his hand to his girdle for it. Very cautiously he crept along the path. Bruin saw him, and was now angry and hungry, and came down to meet him. The bear was somewhat above him; Grettir halted, and the bear stood up growling on his hind-legs.
At once the long sword was whirled and fell on the right wrist above the paw, and cut it off. The bear immediately fell down on all-fours; but the amputated paw was on the side away from the wall of rock, and when he went down on the stump he was overbalanced, and came down with his whole weight on Grettir.
Grettir let fall his long sword at once, and with both hands grasped the brute's ears, and held his head off lest he should get a bite at him. Grettir, in after years, was wont to say that this was the hardest tussle he had in his life—it was even worse than anything he had to do with the rovers. For if the beast had but been able to nip him on the breast, or shoulder, or face with his great fangs, all would have been up with him. Moreover, the ears were so smooth that he had to do his utmost not to let them slip. Grettir had the wit to drag back the brute's head to the rock, and by so doing the bear could not use his only uninjured fore-leg, armed with terrible claws, which would have ripped Grettir's clothes and flesh.
In the struggle the two went over the edge, and for a moment Grettir thought, as they spun in the air, that he was lost. But the bear was heavier than the lad, consequently he fell crash on the rocks at the bottom first, and Grettir on him, breaking Grettir's fall by his great body. The bear's back was broken.
Then Grettir got up, shook himself, left the bear, went up the path and found his fur coat torn to tatters, and he put it about him, recovered also his long sword, and took the cut-off paw of the bear.
He now went back to Thorgils' house, and when he came into the hall where the fires were blazing, every one laughed to see him in his tattered coat; but when he gave the paw of the bear to Thorgils the general merriment exchanged to surprise. Biorn, however, could not contain himself for vexation, and launched forth some coarse jest that made Grettir's blood tingle in his veins.
"Do not listen to him," said Thorgils. "You are a brave fellow, and there are not many your like." Then turning to Biorn, he said, "Kinsman, I advise and warn you to keep a civil tongue in your head, or you will come to rue it, and have to be taught better manners."