Feridun has three sons--Salm (Çairima), Tur (Tuirya), and Yrej (Airyu); to the last, who was the youngest, Feridun gives Iran, the best part of his dominions, while Salm receives the West and Tur the North. Filled with envy at the favour shown to their youngest brother, Salm and Tur slay the pious Yrej. Feridun is deeply moved; but he gives the daughter whom Yrej has left in marriage to Pesheng. The son of Pesheng is Minocher, who grows up to avenge his grandfather's death. In order to prevent this, Salm and Tur invade Iran. The battle continues for three days, till Minocher has slain Tur with his own hand. He also overtakes Salm in flight, and slays him. Feridun can now die in peace, as he has seen the kingdom handed over to Minocher. After the death of the latter the kingdom descended to his son Naudar.[438] Then Afrasiab of Turan, the great-grandson of Tur, whom Minocher had slain, invaded Iran to avenge the death of his ancestor on the descendant of Minocher. Naudar's army was defeated; he was taken captive with many princes of Iran, and beheaded by the order of Afrasiab. Besides the race of Abtin, Jemshid had left other descendants. In union with the daughter of the king of Cabul, whose kingdom extends from Bost on the Hilmend to Ghasna (and consequently includes the region of Sejestan, the ancient Haetumat),[439] he had begotten Gershasp, a mighty hero who stood by the side of Minocher in the struggle against Salm and Tur; the sons of Gershasp are Neriman and Sam, and his grandson is Zal. The Gershasp of Firdusi is the Kereçaçpa of the Avesta, the son of Thrita, of the race of Çama (p. 35), who slays the serpent Çruvara and the giant Gandarewa. The Avesta gives him the epithet Nairimanao, _i.e._ the man-hearted, heroic, and represents him as seizing the brilliance of majesty, when it departed for the third time from Yima (p. 36). This hint was enough to give the royal power to Kereçaçpa; his epithet and his tribal name are personified, and become his descendants Neriman and Sam. In accordance with their origin these princes from Zabul are in Firdusi the most faithful adherents of the race of Feridun, which has rewarded them with the dominion over the South. In this way the legend of Sejestan is woven into the closest connection with the legend of the Avesta. The power of the descendants of Feridun is extinguished with Naudar, from whose sons "the splendour of the royal majesty shines no longer;" thus does Firdusi repeat the metaphor current in the Avesta. The princes of Zabul now take their place as the protectors and guardians of Iran. The son of king Sam of Zabul is Zal. After Naudar's melancholy fall he makes peace between Iran and Turan; the Oxus is fixed as the boundary, Afrasiab returns to his own country, and in the place of the sons of Naudar Zal allows Zav to be chosen king of Iran. Zav is already aged and soon dies; Afrasiab invades Iran again. Then Zal deliberates with the Mobedhs (_i.e._ with the chiefs of the Magians, p.