Which preposition to use with hirers

of Occurrences 3%

Look at the sacristans, the beadles, the lackeys of the Bishop's palace, the hirers of chairs, the choir-men, the sellers of tapers, the tradesmen by appointment to the religious houses, the beggar who stretches out his hand to you at the door, and the man who hands you the holy-water sprinkler, have they not all the same hypocritical face, the same cunning, devoutly sanctimonious look?

in Occurrences 2%

The hirers in their turn had the problem, growing more intense with the advance of costs, of procuring full work without resorting to such rigor of discipline as would disquiet the owners of their employees.

Which preposition to use with  hirers