"What's wrong?" called Reade.
"I wish I knew," muttered Dave. "There is no further signaling."
"Then——-"
That was as far as Tom got with his hint at an explanation.
"Cut it," retorted Darrin briskly. "Keep the rope steady. I'm going down there."
"Can you——-"
"Yes!" blazed Dave recklessly. "Watch me. Here goes nothing!"
As the last three words left his lips Darrin swung free over the roof edge.
He was going down the straining, smooth rope now, hand under hand.
The dense crowd in the street below was quick to realize that something new and tragic was on the cards.