The Further Adventures of Robinson Crusoe by Daniel Defoe Chapter 15 Page 34

All the country between the river Oby and the river Janezay is as entirely pagan, and the people as barbarous, as the remotest of the Tartars.

I also found, which I observed to the Muscovite governors whom I had an opportunity to converse with, that the poor pagans are not much wiser, or nearer Christianity, for being under the Muscovite government, which they acknowledged was true enough — but that, as they said, was none of their business; that if the Czar expected to convert his Siberian, Tonguse, or Tartar subjects, it should be done by sending clergymen among them, not soldiers; and they added, with more sincerity than I expected, that it was not so much the concern of their monarch to make the people Christians as to make them subjects.

From this river to the Oby we crossed a