“What items are they?” I asked.
“First there is the fact that the dead man had knocked his head heavily against some periodically submerged body covered with acorn barnacles and serpulæ. Now the piles of this lighthouse answer to the description exactly, and there are no other bodies in the neighbourhood that do: for even the beacons are too large to have produced that kind of wound. Then the dead man’s sheath-knife is missing, and Jeffreys has a knife-wound on his hand. You must admit that the circumstantial evidence is overwhelming.”
At this moment the captain bustled into the room with the telescope in his hand. “The tender is coming up towing a strange boat,” he said. “I expect it’s the missing one, and, if it is, we may learn something. You’d better pack up your traps and get ready to go on board.”
We packed the green case and went out into the gallery, where the two keepers were watching the approaching tender; Smith frankly curious and interested, Jeffreys restless, fidgety and noticeably pale. As the steamer came opposite the lighthouse, three men dropped into the boat and pulled across, and one of them—the mate of the tender—came climbing up the ladder.
“Is that the missing boat?” the captain sang out.
“Yes, sir,” answered the officer, stepping onto the staging and wiping his hands on the reverse aspect of his trousers, “we saw her lying on the dry patch of the East Girdler. There’s been some hanky-panky in this job, sir.”
“Foul play, you think, hey?”
“Not a doubt of it, sir. The plug was out and lying loose in the bottom, and we found a sheath-knife sticking into the kelson forward among the coils of the painter. It was stuck in hard as if it had dropped from a height.”
“That’s odd,” said the captain. “As to the plug, it might have got out by accident.”
“But it hadn’t sir,” said the mate. “The ballast-bags had been shifted along to get the bottom boards up. Besides, sir, a seaman wouldn’t let the boat fill; he’d have put the plug back and baled out.”