The Sultan received him with every distinction, and in taking farewell asked for siege engines. Rokn ud din sent a great catapult, shields and many engines of value. The princes of Amid and Mardin sent their submission through envoys. Next came an embassy from Bagdad. Nassir, the Kalif, had died during 1225 in the forty-sixth year of his rule, the longest rule of any man in the whole line of Abbasids. Zahir, Nassir’s son and successor, had been only nine months in office when he died. Mostansir, his son, then succeeded. Mostansir now sent an envoy to make two demands upon Jelal; first that the Sultan would claim no rights of a sovereign in Mosul, Erbil, Abuye and Jebal whose princes were vassals of the Kalif; second that he would restore the name of the Kalif in all public prayers throughout Persia. Shah Mohammed, his father, had abolished this practice when he was marching on Bagdad, and had not restored it. The Sultan granted both requests straightway and commanded that in all his states every Moslem should pray for Mostansir. When the envoy returned a chamberlain of the Sultan went with him. This chamberlain came back with two officials, who brought from the Kalif a robe of investiture to Jelal, and splendid presents to him and his highest officials. Jelal asked earnestly for the title of Sultan. Bagdad refused, having given thus far, as was stated, that title to no ruler, but while investing him the Kalif gave the title Shah in Shah (Shah of Shahs). In letters after that Jelal styled himself servant of the Kalif whom he called lord and master. While besieging Khelat the Sultan commanded to adorn Ispahan with a college, and a domed mausoleum of rich structure. This building was to hold the sarcophagus of his father which meanwhile would rest on the Demavend mountain in Erdehan, a strong fortress three days’ journey from Rayi toward the Caspian. He requested by letter his aunt, Shah Khatun, a widow of the Mazanderan prince named Ardshir, to attend the “great Sultan’s” remains to the fortress. The chief men of her country and the Moslem Ulema were to go with her. Mohammed of Nessa, who indited the letter with this request, declares that he sent it unwillingly, since he knew well that Mohammed’s remains were far safer on that island in the Caspian than they ever could be in the fortress; for the Mongols burned the corpses of all kings whose graves they found, believing them of the Kwaresmian dynasty. They dug up in Gur the remains of Mahmud, son of Sebak Tegin, though this prince had been dead two whole centuries. “The event failed not to justify my fears,” adds Mohammed Nessavi. [11] “After Jelal had been slain the Mongols took the Erdehan stronghold and sent the body of Mohammed to Ogotai who burned it.”