Which preposition to use with fiala

down Occurrences 1%

At the telegraph office we received news that the voyage of Lauriado and Fiala down the Papagaio had opened with a misadventure.

with Occurrences 1%

Colonel Rondon, Fiala with his camera, and I went in this canoe, together with two paddlers.

Which preposition to use with  fiala