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Rh particular blood—natives and foreigners having intermarried for several generations. You will see them all when you get there."

"Are the islands of volcanic formation?" asked Oliver.

"Both volcanic and coral formation. The soil everywhere is composed of pulverized stone, sand, sea-mud, and ashes, mixed up with broken coral, and constant irrigation is necessary to assure a perfect crop."

"What of oysters?" asked Oliver suddenly.

"You want to know about those pearls, don't you?" laughed the doctor. "Well, pearl oysters are about the only kind that thrive around the islands, and the common oyster of America is unknown. Pearls are plentiful, but a good many of them are worthless. In years gone by the pearl industry was monopolized by the king. If those pearls were really hidden as the parchment says they were discovered and gathered without the royal knowledge, you may be sure of that."

"I reckon the king wanted everything," grumbled Dan. "That's the reason they made the queen step down and out. Onward the Flag of Freedom takes its way!"

"That's right, Dan. One of these days I expect to see the whole world free, if not under our own Stars and Stripes, then under some banner which shall be equally just to all."