"I have; and I have volunteered to do the job," answered Grimme, with a degree of assurance which astonished even Shuffles.

"You dare not do it!"

"I dare, and I will, if the fellows will stand by me. Lowington is sitting at the table in the professors' cabin, right under the skylight, reading. One section of the skylight is open, and you can see him, as plain as day. It's as dark as a pocket on deck, and the officers can't see you twenty feet off. All I have to do is to pop the oil through the opening, and get out of the way."

"What then?"

"Why, he will come on deck, and try to find out who did it; but he can't."

"Perhaps he can."

"No, he can't; only half a dozen of the fellows will know anything about it, and of course they won't let on."

"Suppose he don't find out. What good will this trick do?"

"The second part of the port watch must follow up the game. Lowington will come on deck at eight bells, and Monroe, in the starboard watch, will give him another dose."

"What will that be?"