Which preposition to use with reefer

in Occurrences 1%

"It would hardly interest you to tell what a clever set of lieutenants and ward-room officers we had, and how the twenty-three reefers in the two steerage messes kept up a racket and a row all the time, in spite of the taut rein which the first lieutenant, Mr. Bispham, kept over us.

Which preposition to use with  reefer