Which preposition to use with dnieper

into Occurrences 1%

St. Andrew, the first called of the Twelve, hailed with his blessing long beforehand the destined introduction of Christianity into our country; ascending up and penetrating by the Dnieper into the deserts of Scythia, he planted the first cross on the hills of Kieff.

to Occurrences 1%

John de Plano Carpini and Benedict, travelled through Bohemia and Poland to Kiow in Russia, and thence by the mouth of the Dnieper to the camp of Korrensa, or Corrensa, a general of the Mongals; whence, crossing the Don and Wolga or Volga, they came to the encampment of Bata-khan, called also Baty and Baatu, who sent them to Kajuk-khan, the emperor of the Mongals, whom they call Cuyne.

Which preposition to use with  dnieper