"Not if they had a key?"
"It must have been that way," agreed Jack, "but where did they get this key? That don't lessen the puzzle. It was a Yale lock, and keys to them are not to be had easily, and they must have had one for the front door, too."
"Well, if they could get the one they could get the other," said
Rand.
"I suppose so," agreed Jack. "It probably wouldn't be much harder to get two than one."
"Why couldn't they get in through a window?" pursued Rand.
"The windows were all locked on the inside as well as the doors."
"I see. They must have been professionals."
"Then I don't see what they wanted there."
"Why not?"
"Because they wouldn't get enough swag to make it worth while," answered Jack,