Warrington's confidence in his discovery began to shake. He braced himself and took a bold course.
"Patty, you wrote that letter; you know you did. You wrote it in New York, the day you bought the tablets."
"I?"
"Yes. Confess."
"My dear Mr. Warrington, you must prove it," lightly. "It would not be proper for me to admit that I had been so foolish as to write a letter like that."
"But you've praised it!"
"Simply because praising it would please you; for no other reason."
"Did you, or did you not write it?"
"Find out. You must prove that I wrote it. Certainly I have nothing to confess."
"You will not answer me one way or the other?"