“He was in the car that took friend Meadows, who transferred to the char-à-banc somewhere out of sight of the house.”

Washington had taken a small cardboard box from his pocket and was rubbing a red powder gingerly upon the two white-edged marks, groaning the while.

“This is certainly a snake that’s got the cobra skinned to death and a rattlesnake’s bite ain’t worse than a dog nip,” he said. “Mamba nothing! I know the mamba; he is pretty fatal, but not so bad as this.”

Manfred looked across to Leon.

“Gurther?” he asked simply, and Gonsalez nodded.

“It was intended for me obviously, but, as I’ve said before, Gurther is nervous. And it didn’t help him any to be shot up.”

“Do you fellows mind not talking so loud?” He glanced at the heavy curtains that covered the windows. Behind these the shutters had been fastened, and Dr. Oberzohn was an ingenious man.

Leon took a swift survey of the visitor’s feet; they wore felt slippers.

“I don’t think I can improve upon the tactics of the admirable Miss Leicester,” he said, and went up to Mr. Lee’s bedroom, which was in the centre of the house and had a small balcony, the floor of which was formed by the top of the porch.

The long French windows were open and Leon crawled out into the darkness and took observation through the pillars of the balustrade. They were in the open now, making no attempt to conceal their presence. He counted seven, until he saw the cigarette of another near the end of the drive. What were they waiting for? he wondered. None of them moved; they were not even closing on the house. And this inactivity puzzled him. They were awaiting a signal. What was it to be? Whence would it come?