Which preposition to use with cognisance
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.
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.