Then he commenced a series of visits to the petty orthodox courts which separated Ts'i from Ts'u. Several of them were rude and neglectful to this unfortunate prince in distress; but Sung was an exception, for Sung ambition, as above narrated, had been roughly checked by Ts'u, and Sung now wished to make overtures to Tsin instead, and to conciliate a prince who was as likely as not to come to the throne of Tsin. In 637 the prince reached the court of Ts'u, whose ruler had quite recently begun to take formal and official rank as a "civilized" federal prince. Meanwhile, news came that his brother (by his own mother's younger sister) was dead; this younger brother had taken refuge in Ts'in during the reign of his youngest brother (the one born of the last Tartar favourite), and had, after that brother's death, been most generously assisted to the throne in turn by the ruler of Ts'in, on the understanding, however, that Tsin should cede to Ts'in all territory on the right bank of the Yellow River, i.e. in the modern province of Shen Si: but the new Tsin ruler had been persuaded by his courtiers to go back on this humiliating bargain, in consequence of which war had been declared by Ts'in upon Tsin, and the faithless ruler of Tsin had been for some time a prisoner of war in Ts'in; but, regaining his throne through the influence of his half-sister, the wife of the Ts'in ruler, had died in harness in 637 B.C. This deceased ruler's young son was not popular, and Ts'in was now instrumental in welcoming the refugee back from Ts'u, and in leading him in triumph, after nineteen years of adventurous wandering, to his own ancestral throne; his rival and nephew was killed.