After the grand convocation described in the last chapter, Genghis Khan lived only three years. During this time he went on extending his conquests with the same triumphant success that had attended his previous operations. Having at length established his dominion in Western Asia on a permanent basis, he returned to the original seat of his empire in the East, after seven years' absence, where he was received with great honor by the Mongul nation. He began again to extend his conquests in China. He was very successful. Indeed, with the exception of one great calamity which befell him, his career was one of continued and unexampled prosperity. This calamity was the death of his son Jughi, his oldest, most distinguished, and best-beloved son. The news of this event threw the khan into a deep melancholy, so that for a time he lost all his interest in public affairs, and even the news of victories obtained in distant countries by his armies ceased to awaken any joyful emotions in his mind. The khan was now, too, becoming quite advanced in life, being about sixty-four years old, which is an age at which the mind is slow to recover its lost elasticity. He did, however, slowly recover from the effects of his grief, and he then went on with his warlike preparations. He had conquered all the northern portion of China, and was now making arrangements for a grand invasion of the southern part, when at length, in the spring of the year 1227, he fell sick. He struggled against the disease during the summer, but at length, in August, he found himself growing worse, and felt that his end was drawing nigh. His mind was occupied mainly, during all this interval, by arranging the details of the coming campaign, and making known to the officers around him all the particulars of his plans, in order that they might carry them out successfully after his decease. He was chiefly concerned, as well he might be, lest the generals should quarrel among each other after he should be gone, and he continually exhorted them to be united, and on no account to allow discord or dissensions to creep in and divide them. His oldest son, next to Jughi, was Jagatay, but he was of a mild and amiable temper, and not so well qualified to govern so widely-extended an empire as the next son, whose name was Oktay. The next son to Oktay, whose name was Toley, was with his father at the time when his sickness at last assumed an immediately alarming character.