“Where do you expect to look for the leader of this gang?” asked the manager.

“I’m going to drive up to Center Square again, right now. In a hired ‘drive it yourself’ car.”

“Isn’t that where you got that blow on your head?”

“Yes, but you needn’t worry about me this time, Mrs. Hilliard. I’m going to get a policeman to go with me to the empty house.”

“Wise girl.... But I believe you’d be wiser still, Mary Louise, if you just dropped the thing now and went home for Christmas. You’ve certainly earned your pay, and we can feel that our troubles are over. I can give the guests some assurance that they will not be robbed again. Won’t you go, dear? Your family will be wanting you.”

“Oh no, Mrs. Hilliard—thank you just the same. But I couldn’t think of it. I want to recover the stolen goods and get more proof against those two girls. I couldn’t give up now!”

“Well, then, be very careful!”

“I’ll be back in time for supper,” she promised.

Mary Louise went directly to the nearest agency and hired a car. Not a new car, but one which ran smoothly and which she found no difficulty in operating. The day was warm for December, and sunny; the snow was gone; it would be jolly to spend the whole day out-of-doors. Of course, it would have been nicer if Jane or Max were with her, but Mary Louise had so much to think about that she did not mind being alone.

Wasn’t it funny, she mused, that the very first guest she had met at Stoddard House had been the guilty person? How thankful she was that she had not given in to that impulse to make Pauline Brooks her confidante! Perhaps, if she had, Pauline would not have stolen her watch. Yet, without that misfortune, Mary Louise might never have solved the mystery.