By this time it became clear to everyone that it was not a fire. As the weird illumination continued its fantastic gambols, little points of light began moving about the deck.

Just then Caradoc's grave voice hazarded: "That must be an extraordinary display of St. Elmo's fire. I should say a storm was brewing."

"Would St. Elmo's fire 'urt th' vessel, sir?" asked a cockney.

"Not at all," replied the Englishman.

As Leonard stared a queer thought came into his head. He looked around at his companions. In the faint radiance from the mysterious schooner, he could make out their faces, pale blurs all fixed on the strange spectacle. He picked out the heavy form of Farnol Greer and moved over to his friend. Under the cover of excited talking and exclamations, he asked in a low tone.

"There was somebody on that schooner this morning, Farnol?"

"Just what I was thinking, sir."

"He could have hidden from us. You thought he must be crazy—a crazy man would probably have secreted himself."

"I had it in mind, sir, the very thing."

"Now could he possibly make a light like this?"