strict inquiry

References in classic literature ?
And I believe, upon a strict inquiry, those quarrels might be shown as ill-grounded among us as they are among that people.
When he could persuade him to remain, for a few moments, in the care of the people to whom the house belonged, he instituted a strict inquiry whether any stranger had been seen, and searched himself behind the tree, and through the orchard, and upon the land immediately adjoining, and in every place near, where it was possible for a man to lie concealed; but all in vain.
The business was a pawnbroker's, of the most magnificent sort both in extent and profits; and on a short acquaintance with it Bulstrode became aware that one source of magnificent profit was the easy reception of any goods offered, without strict inquiry as to where they came from.
However, he said that a strict inquiry would be carried and he would fire whoever might be involved in the negligence.