"What can that be?" I asked myself.

The next instant the bos'n came running down the companion, and, knocking at the door of my father's cabin, he exclaimed—

"A large steam-yacht approaching, sir!"

"Any flag?"

"No, sir; she shows no colours."

"How far away is she?"

"About two miles to the south-east, and she's making straight for the island."

"The rival treasure-seekers!" I exclaimed excitedly. "Now for some excitement," and, hastily completing my toilet, I rushed on deck, where Uncle Herbert, Dr. Conolly, and the crew, save those who manned the windlass, were intently watching the approach of the strange craft. Presently we were joined by my father.

The vessel, which had apparently been making about eleven knots, was now within half a mile, and her engines were eased down preparatory to anchoring. She was about two hundred tons displacement, with schooner bows, and carried two pole masts. With a telescope I saw the crew, clustered up for'ard, regarding us with the same curiosity that we were bestowing upon them. They were mostly dark-featured, some being black, and were rigged out in white canvas clothing and red-stocking caps. On the bridge were five or six men, evidently officers, in dark-blue uniforms; plentifully embellished with gold lace and buttons. A more inappropriate uniform for the tropics would be hard to obtain, unless it were a motor-coat; but it seemed evident from their love of finery; that these men came from a Latin nation—Italy or Spain, or one of their offshoots.

"Up and down!" shouted the bos'n, who was superintending the weighing of the anchor, referring to the fact that the chain had already taken the weight of our ground-tackle off the bottom'.