Of a certain

certainly.

See also: Certain

References in classic literature ?
When not engaged in reading Virgil, Homer, or Mistral, in parks, restaurants, streets, and suchlike public places, he indited sonnets (in French) to the eyes, ears, chin, hair, and other visible perfections of a nymph called Therese, the daughter, honesty compels me to state, of a certain Madame Leonore who kept a small cafe for sailors in one of the narrowest streets of the old town.
And dost thou know of a certain spot called Fountain Abbey?
An obscure scribe in the Secretariat had overheard a few words of a certain conversation, and had caught a glimpse of a certain report.
Four times a year the youth of a certain district meet to show their proficiency in running and leaping, and other feats of strength and agility; where the victor is rewarded with a song in his or her praise.
And there came before him the vision of a certain "little lady," about whom he had been thinking deeply of late.
I had not been seated very long ere a man of a certain venerable robustness entered; immediately as the storm-pelted door flew back upon admitting him, a quick regardful eyeing of him by all the congregation, sufficiently attested that this fine old man was the chaplain.
Tragedy, then, is an imitation of an action that is serious, complete, and of a certain magnitude; in language embellished with each kind of artistic ornament, the several kinds being found in separate parts of the play; in the form of action, not of narrative; through pity and fear effecting the proper purgation of these emotions.