Which preposition to use with unsettledness

of Occurrences 1%

And your lordship has one particular reason to promote this undertaking because you were the first who gave me the opportunity of discoursing it to his majesty, and his royal highness; they were then pleased both to commend the design, and to encourage it by their commands; but the unsettledness of my condition has hitherto put a stop to my thoughts concerning it.

Which preposition to use with  unsettledness