Which preposition to use with emboldens

in Occurrences 3%

He thinks I might be emboldened in a striking costume like this.

by Occurrences 2%

The rebels also showed at the Metcalfe picket, attacking at the same time with their infantry; and becoming emboldened by receiving no opposition from us, the greater part of their force advanced nearer and nearer to the ridge, till they were seen distinctly from the Mosque battery.

to Occurrences 2%

I began now to be afraid lest his pride should, by silence and submission be emboldened to insults that could not easily be borne, and therefore coolly considered, how I should repress it without such bitterness of reproof as I was yet unwilling to use.

with Occurrences 2%

Millions of Creatures derive their Sight from this Original, who, besides his being the great Director of Opticks, is the surest Test whether Eyes be of the same Species with that of an Eagle, or that of an Owl: The one he emboldens with a manly Assurance to look, speak, act or plead before the Faces of a numerous Assembly; the other he dazzles out of Countenance into a sheepish Dejectedness.

Which preposition to use with  emboldens