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"It is a nice household," he murmured. "That is the baboon."

I had forgotten the strange pets which the Doctor affected. There

was a cheetah, too; perhaps we might find it upon our shoulders

at any moment. I confess that I felt easier in my mind when,

after following Holmes' example and slipping off my shoes, I

found myself inside the bedroom. My companion noiselessly closed

the shutters, moved the lamp onto the table, and cast his eyes

round the room. All was as we had seen it in the daytime. Then

creeping up to me and making a trumpet of his hand, he whispered

into my ear again so gently that it was all that I could do to

distinguish the words:

"The least sound would be fatal to our plans."

I nodded to show that I had heard.

"We must sit without light. He would see it through the

ventilator."

I nodded again.

"Do not go asleep; your very life may depend upon it. Have your

pistol ready in case we should need it. I will sit on the side of

the bed, and you in that chair."