Which preposition to use with cognisance

of Occurrences 27%

I might through great Pusillanimity, blush to give you this Anxiety, did not I opine you were as gracious as communicative and eminent; and though you have no Cognisance of me, your humble Servant,yet I have of you,you being so gravely fam'd for your admirable Skill both in Galenical and Paracelsian Phaenomena's, and other approv'd Felicities in Vulnerary Emeticks, and purgative Experiences.

on Occurrences 1%

The unknown champion who comes into the lists with barred vizor and no cognisance on his shield leaves it not long uncertain for which of the contending parties he appears; but his weapons and his manner of fighting are not the ordinary ones of the side which he takes; and there is a force in his arm, and a sweep in his stroke, which is not that of common men.

Which preposition to use with  cognisance