How unworthy he was of love like this? How——

But his thoughts were interrupted.

Edna Callister had spoken again.

"Frank, I believe your innocence firmly," she said, in clear, decided tones, "I believe it first because I know your heart, second, because—because—oh, how can I say it! Because—Frank, you will not betray me—because my father tries to make me think you guilty, and I know my father to be a very wicked man."

"Edna!"

"It is true, Frank. You know it is true. It is my firm belief that he is at the bottom of a plot against you, and that you know this to be the fact. Is it not so?"

"Edna, I cannot tell you."

"But you must. I insist upon knowing. It is because you have discovered his baseness at last, because you know what I say to be true that you have kept away from me, and hate me for all I know. It is for this reason that you are watching him in his office in this disguise."

"Edna, I love you and shall love you always, no matter what your father may be to me. I promise faithfully—— Hark! what noise was that?"

It was the sound of some one without the window tapping gently upon the pane.