Which preposition to use with grimiest

of Occurrences 1%

Stephen Remsen, in the grimiest of moleskins, stood talking to the captain, and, in obedience to the command of the latter, some fifteen youths, clad for the coming fray, were trotting down the field, while eight others, backs and substitute backs on the two teams, passed and dropped on the pigskin in an endeavor to keep warm.

Which preposition to use with  grimiest