“Turn the light over the side, and see if we fastened that boat. We don’t want to be left here indefinitely.”

“That’s folly, Mac,” I said, but I obeyed him. “The watchman’s boat is there, so we—”

But he caught me suddenly by the arm and shook me.

“My God!” he said. “What is that over there?”

It was a moment before my eyes, after the flashlight, could discern anything in the darkness. Mac was pointing forward. When I could see, Mac was ready to laugh at himself.

“I told you the place had my goat!” he said sheepishly. “I thought I saw something duck around the corner of that building; but I think it was a ray from a searchlight on one of those boats.”

“The watchman, probably,” I said quietly. But my heart beat a little faster. “The watchman taking a look at us and gone for his gun.”

I thought rapidly. If Mac had seen anything, I did not believe it was the watchman. But there should be a watchman on board—in the forward house, probably. I gave Mac my revolver and put the light in my pocket. I might want both hands that night. I saw better without the flash, and, guided partly by the bow light, partly by my knowledge of the yacht, I led the way across the deck. The forward house was closed and locked, and no knocking produced any indication of life. The after house we found not only locked, but barred across with strips of wood nailed into place. The forecastle was likewise closed. It was a dead ship.

No figure reappearing to alarm him, Mac took the drawing out of his pocket and focused the flashlight on it.

“This cross by the mainmast,” he said “that would be where?”