With apprehension Monty watched him advance swiftly toward the switch on the centre wall by the window. “Get over by that window,” he commanded, and Monty hurriedly obeyed him. Then he turned off the lights, leaving the room only faintly illuminated by the moonlight coming through the French windows.

“What the devil’s up?” Monty asked excitedly.

“Is there anyone there on the lawn?”

Monty peered anxiously through the glass. “No,” he whispered, and then added: “Yes, there’s a man over there by the big oak. By Jove, there is!”

“What’s he doing?” the other demanded.

“Just standing and looking over this way.”

“He’s detailed to watch the house. Anybody else with him?”

“Not that I can see.”

“Come away, Monty,” Denby called softly, and when his friend was away from observation, he switched on the light again. “Now,” he asked, “do you believe that we were followed?”

“The chills are running down my spine,” Monty confessed. “Gee, Steve, I hope it won’t come to a gun fight.”