Which preposition to use with composedness

of Occurrences 2%

But in truth, there is no practice more crossing the genuine nature of genteelness, or misbecoming persons well born and well bred; who should excel the rude vulgar in goodness, in courtesy, in nobleness of heart, in unwillingness to offend, and readiness to oblige those with whom they converse, in steady composedness of mind and manners, in disdaining to say or do any unworthy, any unhandsome things.

Which preposition to use with  composedness