some confederate could commit a robbery, maybe."
"A robbery? Do you think that man was a thief?"
"I don't know that he was, Tom, and yet a jeweler has to be always on the watch, and that isn't a joke, either, Tom Swift. Swindlers and thieves are always on the alert for a chance to rob a jewelry store, and they work many games."
"I didn't notice any particular man looking in here," said Tom, who still held the diamond brooch in his hand.
"Well I did," went on the jeweler. "I happened to glance out of the window when you were looking at the pins, and I saw his eyes staring in here in a suspicious manner. He may have a confederate with him. and, when you're gone, one may come in, and pretend to want to look at some diamonds. Then, when I'm showing him some, the other man will enter, engage my attention, and the first man will slip out with a diamond ring or pin. It's often done."
"You seem to have it all worked out, Mr. Track," observed the lad, with a smile. "How do you know but what I'm in with a gang of
