For a long time there was silence; then he heard the creeping resumed; his jaw tightened and his grip upon the pistol butt grew more rigid. But another instant told him something else. The Japanese were not advancing as he had expected; instead they were retreating along the upper hall.

"They have made up their minds to the situation," was Ashton-Kirk's explanation. "And as facing a stream of bullets does not enter into their calculations, they are about to try something else."

This latter, of course, would be based upon his remaining where he was; and at once he took steps toward the confusion of things by also moving along the hall in the same direction as the others. He had noticed upon his entrance to the house that the hall was almost bare of furniture, so there was small danger of his colliding with anything. Little by little he went on; now and then he paused and listened intently. But there was no sound, however slight. At length his hands touched a smooth surface. It was a door; cautiously he turned the knob and opened it. The room before him was as dark as the hall; and he halted with the door only a few inches ajar, peering within.

"It's a room on the north side, and well toward the rear," passed through his mind, "and it's only natural to suppose that there are windows in it. The blinds must be tightly drawn, for I can't make out even a glimmer of light."

He waited a little, his pistol held ready, then he stepped into the room. The first thing that attracted him was a thin, bright line which apparently lay upon the floor at his right. He studied this for a moment and then it occurred to him what it was. There was a light in an adjoining room, and the rays were seeping under the door. Again he waited, and listened. It had been his purpose to locate a window, unfasten it, and so make his way to the open air; but the light in the room beyond indicated the presence of someone so close at hand as to make this proceeding perilous.

But as no sound came from the lighted room, he made up his mind to venture nearer. He had taken but one step, however, when a board creaked behind him in the darkness. Poised for the next step he halted and again stood listening. Nothing followed, and the breath slowly exhaled from his lungs, his flexed muscles relaxed, and he settled back upon his feet for another spell of silence. He had just about made up his mind that the creak had been caused by himself, when he became aware of another and barely discernible sound. It was soft and hissing, a sort of rubbing, as though one smoothly-surfaced thing were drawn across another. Like a flash the secret agent realized what it was. Some one stood in the doorway with his hands outstretched, as his own had been, and it was their contact with the door frame that made the sound.

Then there came a step, slow, careful, light; a pause followed and then the unknown's breathing could be distinctly heard. Another step followed, cautious, muffled, secret; and again came the pause.

The grip of the secret agent tightened upon the pistol; he faced about softly to meet the newcomer, whom a few steps would bring to his side.