Which preposition to use with flotsam

of Occurrences 8%

Through the gauze screen on to the white operating table passed all the flotsam of wounded humanity in the summer months.

on Occurrences 4%

Yellow, blue, red, striped and parti-colored costumes, restless as the flotsam on a mill-race, swirled into patterns, and broke, and reblended.

from Occurrences 1%

'Wir schen vielmehr uralte Trümmer ähnlicher Mythologenie in ihnen,' (vi. 798) flotsam from ideas of immemorial antiquity.]

in Occurrences 1%

It was swept out of sight like flotsam in the plenteous stream of present content.

Which preposition to use with  flotsam