You can't get away this time, Patty." "I haven't the slightest idea what you are talking about." But she looked at the letter and not at him.
"Do you see those water-marks ?" he demanded.
"Yes.

You will find them in a thousand tablets like this.

I bought a dozen of them in New York; cheap and handy." 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.