"Dogs," said Kemp. "Get dogs. They don't see him, but they wind him. Get dogs."

"Good," said Adye. "It's not generally known, but the prison officials over at Halstead know a man with bloodhounds. Dogs. What else?"

"Bear in mind," said Kemp, "his food shows. After eating, his food shows until it is assimilated. So that he has to hide after eating. You must keep on beating. Every thicket, every quiet corner. And put all weapons--all implements that might be weapons, away. He can't carry such things for long. And what he can snatch up and strike men with must be hidden away."

"Good again," said Adye. "We shall have him yet!"

"And on the roads," said Kemp, and hesitated.

"Yes?" said Adye.

"Powdered glass," said Kemp. "It's cruel, I know. But think of what he may do!"

Adye drew the air in sharply between his teeth. "It's unsportsmanlike. I don't know. But I'll have powdered glass got ready. If he goes too far...."

"The man's become inhuman, I tell you," said Kemp. "I am as sure he will establish a reign of terror--so soon as he has got over the emotions of this escape--as I am sure I am talking to you. Our only chance is to be ahead. He has cut himself off from his kind. His blood be upon his own head."