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Rh could not hear a sound. Then very cautiously he commenced to feel his way towards the door.

Outside a car went by honking discordantly, and with a sort of cynical amusement he wondered what its occupants would think if they knew what was happening in the house so near them. And at that moment someone brushed past him. Like a flash Hugh's hand shot out and gripped him by the arm. The man wriggled and twisted, but he was powerless as a child, and with another short laugh Hugh found his throat with his other hand. And again silence settled on the room….

Still holding the unknown man in front of him, he reached the foot of the stairs, and there he paused. He had suddenly remembered the mysterious thing which had whizzed past his head that other night, and then clanged sullenly into the wall beside him. He had gone up five stairs when it had happened, and now with his foot on the first he started to do some rapid thinking.

If, as Peterson had kindly assured him, they proposed to try and send him mad, it was unlikely that they would kill him on the stairs. At the same time it was obviously an implement capable of accurate adjustment, and therefore it was more than likely that they would use it to frighten him. And if they did—if they did… The unknown man wriggled feebly in his hands, and a sudden unholy look came on to Hugh's face.

"It's the only possible chance," he said to himself, "and if it's you or me, laddie, I guess it's got to be you."