“Give warning at the first move to get into the house. Blaze away with your gun if anybody tries to climb on to the porch.”

Porter had heard nothing, but was wide awake, watching by the light of the lamp that hung at the head of the stairway. And after a caution to vigilance I returned to my chair.

For half an hour I listened closely. The men were open-eyed but silent. The storm kept up its mournful murmur, but no sound that I could attribute to man came to my straining ears.

Suddenly there was a cry from the hall.

“Who's there?” It was Porter's voice.

An instant later there was a crash of glass, an explosion seemed to shake the house, and there was a rush of many feet.

I leaped to the door and flung it open, Lockhart, Wilson and Brown crowding close behind me. A body of men filled the hallway, and Porter was struggling in the hands of three ruffians. His revolver, whose shot we had heard, had been knocked from his hand and lay on the floor.

The sudden appearance of four more weapons in the open doorway startled the enemy into pausing for a moment. I sprang forward and gave the nearest of Porter's assailants a blow that sent him staggering into the midst of his band, and with a wrench Porter tore himself loose from the other two and was with us again.

“What does this mean?” I cried angrily to the invaders. “What are you here for?”

There were perhaps a dozen of them altogether, and in the midst of the band I saw the evil face and snake-eyes of Tom Terrill. At the sight of his repulsive features I could scarce refrain from sending a bullet in his direction.