Which preposition to use with unwarranted

by Occurrences 7%

To delay it for the purpose of completing the organization of a League of Nations or for any other purpose than the formulation of terms essential to peace seemed to me to be taking a risk as to the future wholly unwarranted by the relative importance of the subjects.

in Occurrences 2%

I am aware of the unpoetical cast of the last six lines of my last sonnet, and think myself unwarranted in smuggling so tame a thing into the book; only the sentiments of those six lines are thoroughly congenial to me in my state of mind, and I wish to accumulate perpetuating tokens of my affection to poor Mary.

to Occurrences 1%

And all errands will be unwarranted to-day,' he said as he hurried along the shore, thinking of the different paths round the rocks and through the blackthorn-bushes.

Which preposition to use with  unwarranted