Percy Darrow, unexpected, made his first visit to us the very next evening. He sauntered in with a Mexican corn-husk cigarette between his lips, carrying a lantern; blew the light out, and sat down with a careless greeting, as though he had seen us only the day before.

"Hullo, boys," said he, "been busy?"

"How are ye, sir?" replied Handy Solomon. "Good Lord, mates, look at that!"

Our eyes followed the direction of his forefinger. Against the dark blue of the evening sky to northward glowed a faint phosphorescence, arch-shaped, from which shot, with pulsating regularity, long shafts of light. They beat almost to the zenith, and back again, a half dozen times, then the whole illumination disappeared with the suddenness of gas turned out.

"Now I wonder what that might be!" marvelled Thrackles.

"Northern lights," hazarded Pulz. "I've seen them almost like that in the Behring Seas."

"Northern lights your eye!" sneered Handy Solomon. "You may have seen them in the Behring Seas, but never this far south, and in August, and you can, kiss the Book on that."

"What do you think, sir?" Thrackles inquired of the assistant.

"Devil's fire," replied Percy Darrow briefly. "The island's a little queer. I've noticed it before."

"Debbil fire," repeated the Nigger.

Darrow turned directly to him.

"Yes, devil's fire; and devils, too, for all I know; and certainly vampires. Did you ever hear of vampires, Doctor?"

"No," growled the Nigger.

"Well, they are women, wonderful, beautiful women. A man on a long voyage would just smack his lips to see them. They have shiny grey eyes, and lips red as raspberries. When you meet them they will talk with you and go home with you. And then when you're asleep they tear a little hole in your neck with their sharp claws, and they suck the blood with their red lips. When they aren't women, they take the shape of big bats like birds." He turned to me with so beautifully casual an air that I wanted to clap him on the back with the joy of it.

"By the way, Eagen, have you noticed those big bats the last few evenings, over by the cliff? _I_ can't make out in the dusk whether they are vampires or just plain bats." He directed his remarks again to the Nigger. "Next time you see any of those big bats, Doctor, just you notice close. If they have just plain, black eyes, they're all right; but if they have grey eyes, with red rims around 'em, they're vampires. I wish you'd let me know, if you do find out. It's interesting."

"Don' get me near no bats," growled the Nigger.

"Where's Selover?" inquired Darrow.

"He stays aboard," I hastened to say. "Wants to keep an eye on the ship."

"That's laudable. What have you been doing?"

"We've been cleaning ship. Just finished yesterday evening."

"What next?"

"We were thinking of wrecking the _Golden Horn_."

"Quite right. Well, if you want any help with your engines or anything of the sort, call on me."

He arose and began to light his lantern. "I hope as how you're getting on well there above, sir?" ventured Handy Solomon insinuatingly.

"Very well, I thank you, my man," replied Percy Darrow drily. "Remember those vampires, Doctor."

He swung the lantern and departed without further speech. We followed the spark of it until it disappeared in the arroyo.

Behind us bellowed the sea; over against us in the sky was the dull threatening glow of the volcano; about us were mysterious noises of crying birds, barking seals, rustling or rushing winds. I felt the thronging ghosts of all the old world's superstition swirling madly behind us in the eddies that twisted the smoke of our fire.

We wrecked the _Golden Horn_. Forward was a rusted-out donkey engine, which we took to pieces and put together again. It was no mean job, for all the running parts had to be cleaned smooth, and with the exception of a rudimentary knowledge on the part of Pulz and Perdosa, we were ignorant. In fact we should not have succeeded at all had it not been for Percy Darrow and his lantern. The first evening we took him over to the cliff's edge he laughed aloud.

"Jove, boys, how could you guess it _all_ wrong," he wondered.

With a few brief words he set us right, Pulz, Perdosa, and I listening intently; the others indifferent in the hopelessness of being able to comprehend. Of course, we went wrong again in our next day's experiments; but Darrow was down two or three times a week, and gradually we edged toward a practical result.

His explanations consumed but a few moments. After they were finished, we adjourned to the fire.

Thus we came gradually to a better acquaintance with the doctor's assistant. In many respects he remained always a puzzle, to me. Certainly the men never knew how to take him. He was evidently not only unafraid of them, but genuinely indifferent to them.

Yet he displayed a certain interest in their needs and affairs. His practical knowledge was enormous. I think I have told you of the completeness of his arrangements--everything had been foreseen from grindstones to gas nippers. The same quality of concrete speculation showed him what we lacked in our own lives.

There was, as you remember, the matter of Handy Solomon's steel claw. He showed Thrackles a kind of lanyard knot that deep-sea person had never used. He taught Captain Selover how to make soft soap out of one species of seaweed. Me, he initiated in the art of fishing with a white bone lure. Our camp itself he reconstructed on scientific lines so that we enjoyed less aromatic smoke and more palatable dinner. And all of it he did amusedly, as though his ideas were almost too obvious to need communication.

We became in a manner intimate with him. He guyed th............