"Some prisoner, or prisoners, have escaped," was the answer. "'The signal indicates that. We'll soon find out."

A curious idea came into Jack's head.

CHAPTER XXX

SENOR RALCANTO

Sea Horse Island was not attractive. There was no coral enclosed harbor, filled with limpid blue water—though the sea off shore was blue enough, for that matter. There were a few waving palms, and a hill or two midland. But that was all. The principal building was the political prison, and the barracks, or quarters of the commanding officer and his aides. In fact, Sea Horse Island was as little beautiful as its name. But the eyes of Inez glowed when she saw it, for once it had been home to her.

"And now to see my father!" cried the Spanish girl, when preparations were made for going ashore. "Zey can hardly keep me from seeing him, can zey?" she asked Mr. Robinson and Lieutenant Walling.

"I think not, my dear," said the former. "And if I am any judge of the worth of evidence, they can't refuse to let him go, after we show our documents, though it may take a little time."

"Matters may not be all easy sailing now," suggested the British officer.

"Why not?" demanded Cora.

"Because of the fact that there has been an escape—perhaps several," was the answer. "Those signal flags are a warning to all vessels not to take aboard any refugees that seem to have escaped from here, unless they are taken as prisoners."