After the marriage of his daughter to Daniel’s son, Mindog sustained friendly relations with Russia. He made more than one campaign with Daniel and Vassilko against the Yatvyags and disobedient Lithuanians, and against the Poles, and princes of Northern Russia. He went against the Livonian Knights to fight Riga. When Daniel became a widower, he married a niece of Mindog. Mindog had power now, but he had become too important for his family. His relatives were enraged at his haughtiness; they would not permit him to so exalt himself, and though he was the single ruler of all Lithuania, they ceased not to plan his death. At last personal hatred subdued the man. Mindog’s wife died in 1262, and he grieved much. To her sister, the wife of Prince Dovmont, he sent this message: “Thy sister is dead; come to see us.” When she came, Mindog said: “When dying, thy sister commanded me to marry thee, that her children might not be tormented.” And he took his sister-in-law as wife. Dovmont, in deep anger, planned to kill Mindog. Seeking an ally, he found one in Trenyat, the Jmud prince. In 1263, Mindog sent all his troops against Roman of Bryansk, who ruled east of the Dnieper. Dovmont was in that expedition. While on the road he declared to the leaders that a wizard had warned him not to advance farther, and leaving the army, he returned straightway to Mindog’s castle, where he killed him and his two sons. Trenyat, very likely through a bargain with Dovmont, began to reign in Lithuania in place of Mindog, and also in Jmud, and sent to Tovtivil of Polotsk, his brother, saying: “Come at once; we will seize the whole land and all Mindog’s substance.” The division caused a quarrel. Tovtivil began to think how to kill Trenyat, and Trenyat how to be rid of his brother. Tovtivil’s boyar informed Trenyat of the prince’s designs. Trenyat, being quicker than Tovtivil, killed him and reigned unassisted, but his reign was not long. Four of Mindog’s equerries, to avenge their late prince, murdered Trenyat. Voishelk, when he learned of his father’s death, went to Minsk, but when he heard that Trenyat had been assassinated, he set out with Pinsk forces for Novgrodek, and from there, taking more warriors, he went to Lithuania, where his father’s adherents received him most joyfully. He began to reign, and as if to make men forget that he had ever worn a monk’s habit, he fell to slaying his enemies wherever he found them. In his new rôle of avenger he surpassed himself. Along the Nieman and all the Jmud boundaries Voishelk shed blood for the death of his father. When he had restored what had been taken from Mindog’s possessions, and extended them, and had almost exterminated his father’s enemies, he yielded all to his brother-in-law. He wished to be a monk and retire to Mount Athos. No matter how Shvarn begged, he would not remain, he would have no earthly dominion. “I have sinned much before God and man,” replied Voishelk. “Do thou rule; the land is in peace now.”