"Now I see you are sensible," I said, "and I can undertake to make you well and sound and happy provided you tell the truth."

"Doctor, it burns like fire," he groaned.

"I will see to that," I said. "What is the plot?"

"I have cried off. That's why I got the knife," he said faintly. "But swear to God no harm'll come to me."

"I promise you that," I said, nodding.

"It's the boatswain's plot," he whispered, "and he has more'n half the men. They are going to rise ere ever we get to Buenos Ayres. But I was no party to their plans," he continued feverishly, and as if anxious to convince me, "that's why I've this knife, doctor, because I'm an honest man."

I had more than my doubts of that, but I nodded again.

"You have only done your duty in telling me, Adams," said I, "and I'll keep my promise, provided you hold your tongue about this. They have given you a dose of morphia, and it's lucky it wasn't bigger. If you do what I tell you, we'll have you right in a couple of days."

I made him drink a draught I had brought with me, and, closing the door, left him. A passage led from here to the men's quarters, and as I came out, I signed to Ellison to be noiseless, and put out the light. Then we moved towards the hatchway. When we reached it I happened to glance round at Ellison, and through that brooding darkness, lightened only by a dim swinging lamp, I thought I saw a flitting shadow. But the next swing of the boat threw the light clear into the corner, and there was nothing. We emerged on the lower deck, and thence regained the quarterdeck. There was a bright light in the chart-room, and I led the way thither. I closed the door and turned on the quartermaster. His face was grey, and his hand trembled.

"You heard?" said I.