He covertly watched Dade during her talk with him and discovered that he did not like the way the young man looked at her; he was entirely too familiar even if he was a friend of the family.

He saw, too, that Betty seemed to be an entirely different person when talking to Dade.

For one thing she seemed natural, which she didn't seem when talking to him.

Until he saw her talking with Dade he had been able to see nothing in her manner but restraint and stiff formality, but figuratively, when in Dade's presence she seemed to melt--she was gracious, smiling, cordial.
Betty's attitude toward him during the noon meal puzzled him much.
Some subtle change had come over her.

Several times he surprised her looking at him, and at these times he was certain there was approval in her glances, though perhaps the approval was mingled with something else--speculation, he thought.
But whatever it was, he had not seen it before.