The Stone of Genghis-khan is the most ancient written monument of mongols. The scholars
suppose that it was erected approximately in 1224-1225. This stone was found by russian scientist
G.I.Spasskij in 1832, who brought it to Saint-Petersburg. It is now in the collection of the famous museum of Hermitage.
The inscription on this stone may be transliterated this way:
"Cinggis qan-i sartaGul irgen daquliju baGuju xamuG monGol ulus un arad i Buqa Sociqai xurigsan tur
Esunke QonGodorun Gurban jaGud Gucin tabun alda tur ontudlu Ga"
according to some translations it means the following:
"While all the mongols were celebrating the victory of Genghis-khan over the
Sartool people in Buqa Sociqai, Esunke Qongodorun shot an arrow up to the 335 fathoms"
In other words
After the victory over Sartool Genghis-khan made a feast for all the mongols.
During the feast arrow shooting competition was organized. The best shooter was lord Yesunke,
a grandson (or, according to some sources, nephew) of Genghis-Khan, who shot an arrow up to the 335 fathoms"
Доржи Банзаров. Объяснение монгольской надписи на памятнике князя Исунке, племянника Чингис-хана //Записки Императорского
археологического общества, т. III, СПб 1851 г., стр. 268-292