"Yes, sir," said the operator.
"Know them?"
"Miss Whaley and——"
"That's enough! Where did they go?"
"To the roof. They said they wanted to take a look at the city, as one of the ladies was going away."
"I'll go up and take a look myself!" the sheriff said. "And give us a little speed!"
The boy whizzed the elevator to the top floor; he didn't know what it was all about, but he sensed excitement.
"You take that flight of stairs to the roof," he explained. "There is a door at the top."
Kowen did not wait to thank him. He rushed for the stairs—and ran into Verbeck and Lawrence.
"They're on the roof!" Verbeck said. "And the door is locked, of course!"