“But when the place is closed up, Mayhew will be in it. He’s going to wait for that crook if he has to stay there every night for the next two weeks.
“He may have a long wait — but I don’t think it will be more than a few nights. We’re dealing with a pretty bold crook, I believe; and he’ll be back as soon as he feels he can come there safely.”
“I think so, too,” said Biscayne. “I noticed this afternoon’s papers said that nothing had been found in Harshaw’s place. That’s good bait. You aren’t going to do any more searching, are you?”
“None at all,” said Cardona. “Not until after we get the man we want. Maybe we won’t have to search — after we get through grilling him.
“Meanwhile, we’re still looking for Homer Briggs.”
Commissioner Weston glanced at Biscayne. He saw that Cardona’s scheme for tonight had captured the professor’s imagination. Weston was highly pleased.
His smile began to fade, however, when Cardona brought up the subject of the mysterious messages.
“We’ve got to get results, quick,” declared the detective. “Those letters were too cocky. Harshaw was the first, Glenn was the second. Somebody’s going to be the third. When? How soon?”
“Tomorrow night,” said Biscayne.
“Tomorrow night?” echoed Cardona.