To Sigmund, who has hidden in a wood, Signy sends her eldest boy of ten years that Sigmund may test his courage and see if he is fit to be a helper in seeking revenge. Neither he, however, nor his younger brother stands the test. Signy sees that only a scion of the race of Volsung will suffice, and accordingly disguises herself and lives three days with Sigmund in the wood. From their union a son Sinfiotli is born, whom also, after ten years, she sends out to Sigmund. He stands every test of courage, and is trained by Sigmund, who thinks he is Siggeir's son. Bent on revenge, Sigmund repairs with Sinfiotli to Siggeir's castle. After Sinfiotli has slain the king's two sons, he and Sigmund are overpowered and condemned to be buried alive. With Sigmund's sword, however, which Signy has managed to place in their hands, they cut their way out, then set fire to Siggeir's hall. Signy comes forth and reveals to Sigmund that Sinfiotli is their own son; and then, saying that her work of revenge is complete and that she can live no longer, she returns into the burning hall and perishes with Siggeir and all his race. Sigmund now returns home and rules as a mighty king. He marries Borghild, who later kills Sinfiotli with a poisoned drink, and is cast away by Sigmund. He then marries Hjordis. Lyngvi, the son of King Hunding, was also a suitor and now invades Sigmund's land. The latter hews down many of his enemies, until an old man with one eye, in hat and dark cloak, interposes his spear, against which Sigmund's sword breaks in two. Sigmund falls severely wounded. In the night Hjordis seeks the scene of the combat and finds Sigmund still alive. He refuses to allow her to heal his wounds, saying that Odin no longer wills that he swing the sword. He tells Hjordis to preserve carefully the pieces of the broken sword; the son she bears in her womb shall yet swing the sword when welded anew, and win thereby a glorious name. At dawn Sigmund dies. Hjordis is borne off by Vikings and, after the birth of her son, she becomes the wife of the Danish prince Alf.