...ewildered for conjecture. Presently the door opened again quietly, and Dr. Holmes put in his head, his face bubbling over with amusement, and said: Oh, I forgot to tell you what book this is. It is Nat Thayer 's check-book. Then he shut the door. The gentleman thus designated was understood at that time to be the richest man in Boston. With a mind in which unexpected bubbles of fun were thus liable...