Aunt Gertrude, for once, was at a loss for words. The knitting needles remained suspended in mid-air. Behind the spectacles, her eyes were wide and her mouth remained open in astonishment.

"This affair gets more puzzling every minute," remarked Frank, at last. "Of course dad might have been delayed, or he might have picked up a clue that took him away from Chicago after all. But I think he would have written."

"Perhaps he didn't report at Police Headquarters in Chicago because he was afraid Baldy Turk's gang might find out he was in the city," Joe suggested.

"There's something in that."

"But why wouldn't he be at the hotel?" asked Mrs. Hardy.

"He might be there under an assumed name. If Baldy Turk's gang are on the lookout for him he wouldn't register under his real name. They would be checking up on all the hotels to find him if they thought he was in Chicago," said Frank eagerly. "Perhaps that's why your message didn't reach him."

"Of course, that's why!" sniffed Aunt Gertrude, returning to her knitting, much relieved. "Any one might have known that. It was a waste of time to try to reach him with a telegram, and I said that from the start." The needles clashed.

"Oh, I guess we needn't worry about dad very much. He can look after himself," said Frank, with a warning glance at his brother. Nevertheless, he was deeply worried over the fact that the telegraph company had failed to locate his father. However, he was trying to make light of the matter so as to relieve his mother of worry.

Joe saw his motive.

"Sure, dad can look after himself. There's nothing to be alarmed about. He's probably keeping out of sight in Chicago for fear Baldy Turk's gang will find out he is there. If they ever knew he was on their trail they wouldn't stop at trying to kill him. He said so himself. If he tried to communicate with us it might give them just the clue they are waiting for."