The Emperour of _China_ made a Voyage into Eastern _Tartary_, in the beginning of this Year 1682, after having appeased (by the Death of three Rebellious Kings) a Revolt, formed in some Provinces of the Empire: One of those revolted Princes, was Strangled in the Province, of which he had made himself Master: The second being brought to _Pekin_ with the Principal Heads of his Faction, was cut in Pieces in the sight of the whole Court: The most Considerable among the _Mandarines_, acting with their own hands in this sad Execution, to Revenge upon this Rebel the Death of their Parents, which he had caused to be Cruelly Murdered. The third which was the most Considerable, (and indeed the Chief of all the Revolt) had by a voluntary Death prevented his deserved Punishment, and so put an end to a War, which had lasted for Seven Years. The Peace having been settled, by the Re-establishing in the Empire and all the Provinces, the Peaceable Enjoyment of their Ancient Liberties: The Emperour departed the 23_d._ of _March_ to go into the Province of _Leao-tum_, the Country of his Ancestors, with a Design of visiting their Sepulchers, and (after having honoured them with the usual Ceremonies) of prosecuting his Journey into the Eastern _Tartary_: This Journey was was about 1100 _miles_, from _Pekin_ to the end of it. The Emperour took with him his eldest Son, a young Prince of ten years old, which had already been declared Heir of the Empire: The three principal Queens went also in this Journy, each in their gilded Chariot; the principal Kings also which compose this Empire, were accompanying with all the Grandees of the Court: And the most considerable _Mandarines_ of all the Orders, who having all a very great Train of Attendants, and very numerous Equipage, made a Court about the Emperour of more then 70000 Persons. It was his Will that I should accompany him in this Journey, and that I should be always near him, to the end I might make in his Presence, the Observations, necessary for knowing the disposition of the Heavens, the elevation of the Pole, the Magnetical Declinations of every Place, and for Measuring with Mathematical Instruments the height of the Mountains, and the distances of Places: He was well pleased also to be informed of what concerned Meteors, and many other Physical and Mathematical Matters. In so much, that he gave Order to an Officer to carry upon Horses such Instruments as I should have occasion to make use of, and recommended me to the Prince his Unkle, who is also his Father in Law, and the second Person of the State, he is called by a _Chinese_ Name, which signifies an Associate of the Empire: He gave charge to him to cause all things to be provided for me which were necessary for this Journey, which this Prince performed with a very particular goodness, causing me to Lodge always in his own Tent, and to eat at his Table.