I was on the point of stepping boldly out into the room when a slight noise behind me warned me back into the shadows of a recess in the corridor. Dragging Woola after me I crouched low in the darkness.

Presently the old man passed close by me, and as he entered the dimly lighted chamber which I had been about to pass through I saw that he held a long thin dagger in his hand and that he was sharpening it upon a stone. In his mind was the decision to inspect the radium pumps, which would take about thirty minutes, and then return to my bed chamber and finish me.

As he passed through the great hall and disappeared down the runway which led to the pump-room, I stole stealthily from my hiding place and crossed to the great door, the inner of the three which stood between me and liberty.