penetrating eye

He had a loose hairy benignant face with a humorous but penetrating eye and the usual domelike brow.

For nothing was visible aloft save that one penetrating eye, that brilliant orb which shot down upon them its dazzling beams.

Madame Récamier was not pleased, and her annoyance did not escape the penetrating eye of the artist.

He meditated treachery, and it were hard to say whether it was unnoted by the penetrating eye of Bigot.

Montraville was glad to retire, and by pretending sleep, hide the agitation of his mind from her penetrating eye.