References in classic literature ?
And thereupon he suddenly remembered that he was not sleeping in his wife's room, but in his study, and why: the smile vanished from his face, he knitted his brows.
When I waked Alan, he glanced first at the soldiers, then at the mark and the position of the sun, and knitted his brows with a sudden, quick look, both ugly and anxious, which was all the reproach I had of him.
He knitted his brows like a man who is obliged to relinquish some illusion.
He knitted his brows at emotional points, to show how deeply affected he was.
He flexed his hands together and knitted his brows as he thought before responding to a question about the 1996 election campaign and its many ramifications, both inside and out of the newspaper business.