Which preposition to use with ratcatchers

to Occurrences 1%

The attention which, during my earthly pilgrimage, I had devoted to the science of toxicology indicated me as a person qualified to abate the nuisance, which commission I executed with such success, that I received the appointment of Ratcatcher to his Infernal Majesty, and so discharged its duties as to merit a continuance of the good opinion which had always been entertained of me in that exalted quarter.

Which preposition to use with  ratcatchers