In the search for Soleiman, of whose movements he was in ignorance, Mohammed-Sultan sent soldiers north to Gemlik and Nicaea, and west to Mikhalitch and Karasi. These cities were pillaged, and their inhabitants reduced to slavery. When Mohammed-Sultan learned that Soleiman had escaped to Europe, he sent an embassy to him demanding unconditional surrender. There was no reply. The question of invading Europe was referred to Timur. In the meantime, the advance guard of the Tartars devastated the country which was the cradle of the Ottoman race, while their commander celebrated at Yeni Sheïr his marriage to the eldest daughter of Bayezid. Thus were united the families of Timur and his vanquished foe.[640] Mohammed-Sultan went into winter quarters at Magnesia.[641] Timur left Kutayia in charge of Shah-Rokh, and moved on to Ephesus. He recalled the columns which had been devastating western Asia Minor, and concentrated his forces against Smyrna. What Bayezid had been unable to accomplish in seven years, Timur did in two weeks.[642] The assault of Smyrna was carried on with unceasing energy, and every possible measure was taken to bring it to a speedy conclusion. The walls were undermined, and bridges built out over the water in order that an attack might be made from the side of the sea. When the fortress which crowns the hill behind the city was entered from the land side, the chevaliers of Rhodes fought their way down to their galleys. With lance and sword and oar they beat off the despairing inhabitants who would have swamped their boats. All except a thousand succeeded in escaping. These were decapitated, and of their heads Timur built a pyramid to commemorate his victory.[643] Timur returned to Ephesus. As he approached the city, children came out to meet him, singing songs to appease his wrath. ‘What is this noise?’ he asked. When his attendants told him, he ordered his horsemen to ride over the children. They were trampled to death.[644] Smyrna fell in December, 1402. Timur spent the rest of the winter in Ephesus. He destroyed the work of Bayezid in Asia Minor by restoring to the deposed emirs or their heirs the emirates of Karamania, Tekke, Menteshe, Sarukhan, Aïdin, Kastemuni, and Erzindjian. When he saw that the sons of Bayezid were ready to quarrel about the succession of their father, he began to treat with Isa, Musa and Mohammed, encouraging in each the hope of recognition as sole heir. To Soleiman he sent a diploma, investing him with the Ottoman possessions in Europe as Tartar vassal.[645] Timur enjoyed the position he had won of arbiter of the destinies of the Ottoman Empire. The princes of Europe were now seeking his favour more insistently than before Angora. Henry IV of England wrote to him most cordially, and expressed the hope that he would be converted and become the champion of Christianity.[646]