"By Jove," said the Captain, "it is really wonderful—but wait—you had a visitor, Doctor?"

"I believe it."

"Did he offer to attack you?"

"The spirit of the cavern!" cried the girl.

"A lunatic of an Arab," I retorted, "and so little of a spirit that I had hard work to prevent him throttling me."

"But the face. Did you see the face?"

"Our friend of the cavern," I admitted.

Miss Ottley glanced at the Captain, then back at me. She was as white as a lily.

"I knew it," she said. "I saw him kill the donkey and steal upon you—in a dream. His hands were bloody—and, look, there is blood still on your throat."