be acquainted

References in classic literature ?
So, the student of war who is unversed in the art of war of varying his plans, even though he be acquainted with the Five Advantages, will fail to make the best use of his men.
Almost smiling, he gazed straight into her eyes with such an enraptured caressing look that it seemed strange to be so near him, to look at him like that, to be so sure he admired her, and not to be acquainted with him.
He added that Islamic literature influenced him very much and his friends helped him a lot to be acquainted with it.