"The dog again?" I asked, with a curious sinking of the heart.

"Got right into the tent," he went on, speaking passionately but very low, "and woke my wife by scrambling all over her. Then she realised that Joan was struggling beside her. And, by God! the beast had torn her arm; scratched all down the arm she was, and bleeding."

"Joan injured?" I gasped.

"Merely scratched—this time," put in John Silence, speaking for the first time; "suffering more from shock and fright than actual wounds."

"Isn't it a mercy the doctor was here?" said Mrs. Maloney, looking as if she would never know calmness again. "I think we should both have been killed."

"It has been a most merciful escape," Maloney said, his pulpit voice struggling with his emotion. "But, of course, we cannot risk another—we must strike Camp and get away at once—"

"Only poor Mr. Sangree must not know what has happened. He is so attached to Joan and would be so terribly upset," added the Bo'sun's Mate distractedly, looking all about in her terror.

"It is perhaps advisable that Mr. Sangree should not know what has occurred," Dr. Silence said with quiet authority, "but I think, for the safety of all concerned, it will be better not to leave the island just now." He spoke with great decision and Maloney looked up and followed his words closely.

"If you will agree to stay here a few days longer, I have no doubt we can put an end to the attentions of your strange visitor, and incidentally have the opportunity of observing a most singular and interesting phenomenon—"

"What!" gasped Mrs. Maloney, "a phenomenon?—you mean that you know what it is?"