Some more positive information on this subject is found in the diary of the campaign in Mongolia in 1410, of the Ming Emperor Yung-lo [Pe ching lu].  He reached the Kerulen at the place where this river, after running south, takes an easterly direction.  The author of the diary notes, that from a place one march and a half before reaching the Kerulen, a very large mountain was visible to the north-east, and at its foot a solitary high and pointed hillock, covered with stones.  The author says, that the sovereigns of the house of Yuan used to be buried near this hill.  It may therefore be plausibly supposed that the tombs of the Mongol Khans were near the Kerulen, and that the ‘K’i-lien’ of the Yuan shi is to be applied to this locality; it seems to me even, that K’i-lien is an abbreviation, customary to Chinese authors, of Kerulen.  The way of burying the Mongol Khans is described in the Yuan shi (ch.  ’On the national religious rites of the Mongols’), as well as in the Ch’ue keng lu, ‘Memoirs of the time of the Yuan Dynasty.’  When burying, the greatest care was taken to conceal from outside people the knowledge of the locality of the tomb.  With this object in view, after the tomb was closed, a drove of horses was driven over it, and by this means the ground was, for a considerable distance, trampled down and levelled.  It is added to this (probably from hearsay) in the Ts’ao mu tze Memoirs (also of the time of the Yuan Dynasty), that a young camel used to be killed (in the presence of its mother) on the tomb of the deceased Khan; afterwards, when the time of the usual offerings of the tomb approached, the mother of this immolated camel was set at liberty, and she came crying to the place where it was killed; the locality of the tomb was ascertained in this way.”

The Archimandrite Palladius adds in a footnote:  “Our well-known Mongolist N. Golovkin has told us, that according to a story actually current among the Mongols, the tombs of the former Mongol Khans are situated near Tasola Hill, equally in the vicinity of the Kerulen.  He states also that even now the Mongols are accustomed to assemble on that hill on the seventh day of the seventh moon (according to an ancient custom), in order to adore Chingiz Khan’s tomb.  Altan tobchi (translated into Russian by Galsan Gomboeff), in relating the history of the Mongols after their expulsion from China, and speaking of the Khans’ tombs, calls them Naiman tzagan gher, i.e.  ‘Eight White Tents’ (according to the number of chambers for the souls of the chief deceased Khans in Peking), and sometimes simply Tzagan gher, ‘the White Tent,’ which, according to the translator’s explanation, denotes only Chingiz Khan’s tomb.”