Iziaslav left nothing unattempted to regain his position. He had escaped with his treasure into Poland, but Boleslav was unwilling to renew his former adventure. The German king Henry IV, whom Iziaslav met at Mainz in January, 1075, was more favourably disposed and sent an embassy to Sviatoslav; but it accomplished nothing. Iziaslav also entered into negotiations with pope Gregory VII, to whom he sent his son Iaropolk. The pope hoped to be able to annex Russia to the western church, and even went so far as to grant it to Iaropolk as a fief from the holy see. But meanwhile Sviatoslav died (1076) and Vsevolod, a man whose mild character did not exclude the possibility of a peaceful settlement, became grand prince. Boleslav now lent troops to Iziaslav (1077), and though Vsevolod marched against him with an army of his own, yet they soon came to terms. Iziaslav was to be reinstated grand prince for the third time, while Vsevolod was to retire to Tchernigov, in return for which he was secured in the succession. Thus Iaropolk’s plans came to naught, and with them the hope of a reunited church. However, Vseslav of Polotsk did not yet give up his ambitious designs. Foiled in his attempt on the throne of Kiev, he tried to create an empire for himself in the Russian north, and it required three campaigns of the south-Russian princes to annul his plans. It was during these wars that Vladimir Monomakh, son of Vsevolod and son-in-law of King Harold of England, first distinguished himself, though not in a glorious manner. He was the first Russian prince to engage in a domestic quarrel the Polovtsi, with whose aid he ravaged the city and principality of Polotsk. Vseslav died in 1101 as prince of Polotsk, and his memory lived long after him in the traditions of the people, by whom he was regarded as a sorcerer. The _Song of Igor_ tells how he accomplished in one night a march from Kiev to Tmoutorakan, and how he could hear at Kiev the ringing of the church bells at Polotsk.