"Now, please, drop this in the corner box for me, and take this hat over to Mr. Chittenden's—Sixty-ninth."

"What——"

"Do as I say, or I shall ask you to return the letter to me."

I rushed off toward the letter-box, drew down the lid, and deposited the letter—my letter. When I turned she was running up the steps, and a second later she had disappeared.

I hadn't been so happy in all my life!

Cabby waited at the curb.

Suddenly I became conscious that I was holding something in my hand. It was the benevolent old gentleman's stovepipe hat!

I pushed the button: pushed it good and hard. Presently I heard a window open cautiously.

"What is it?" asked a querulous voice.