Which preposition to use with cacolet

on Occurrences 1%

Hussars and Lancers scouted in the scrub at each side, and within moved the clump of camels, with humorous eyes and supercilious lips, their comic faces a contrast to the blood-stained men who already lay huddled in the cacolets on either side.

with Occurrences 1%

There was a Struggle, a screaming, a mule rolled over, a wounded man sprang up in a cacolet with a spear through him, and then through the narrow gap surged a stream of naked savages, mad with battle, drunk with slaughter, spotted and splashed with bloodblood dripping from their spears, their arms, their faces.

Which preposition to use with  cacolet