At this period the Manchus, whose spoken words were polysyllabic, and not monosyllabic like Chinese, had no written language beyond certain rude attempts at alphabetic writing, formed from Chinese characters, and found to be of little practical value. The necessity for something more convenient soon appealed to the prescient and active mind of Nurhachu; accordingly, in 1599, he gave orders to two learned scholars to prepare a suitable script for his rapidly increasing subjects. This they accomplished by basing the new script upon Mongol, which had been invented in 1269, by Baschpa, or 'Phagspa, a Tibetan lama, acting under the direction of Kublai Khan. Baschpa had based his script upon the written language of the Ouigours, who were descendants of the Hsiung-nu, or Huns. The Ouigours, known by that name since the year 629, were once the ruling race in the regions which now form the khanates of Khiva and Bokhara, and had been the first of the tribes of Central Asia to have a script of their own. This they formed from the Estrangelo Syriac of the Nestorians, who appeared in China in the early part of the seventh century. The Manchu written language, therefore, is lineally descended from Syriac; indeed, the family likeness of both Manchu and Mongol to the parent stem is quite obvious, except that these two scripts, evidently influenced by Chinese, are written vertically, though, unlike Chinese, they are read from left to right. Thirty-three years later various improvements were introduced, leaving the Manchu script precisely as we find it at the present day.