David Copperfield by Charles Dickens Chapter 19 Page 29

The innocent beauty of her face was not as innocent to me as it had been; I mistrusted the natural grace and charm of her manner; and when I looked at Agnes by her side, and thought how good and true Agnes was, suspicions arose within me that it was an ill-assorted friendship.

She was so happy in it herself, however, and the other was so happy too, that they made the evening fly away as if it were but an hour. It closed in an incident which I well remember. They were taking leave of each other, and Agnes was going to embrace her and kiss her, when Mr. Wickfield stepped between them, as if by accident, and drew Agnes quickly away. Then I saw, as though all the intervening time had been cancelled, and I were still standing in the doorway on the night of the departure, the expression of that night in the face of Mrs. Strong, as it confronted his.