"I know every mile of the way," returned old Jacob. "Don't ye fear, lad, but what I'll git ye through in safety;" and this speech relieved Dick a good deal, for he understood only too well how dangerous were the waters they were now sailing.

As they proceeded on their course, the boys questioned Robert Menden regarding the location of the caves, one which was supposed to contain the treasure.

"They are almost directly south of San Juan," said the Englishman. "The distance must be twenty or twenty-five miles. I think we can learn all we want to know on that score when we reach San Juan."

"Well, we can't get there any too quick for me," put in Bob. "I'm just crazy to locate that money box."

"I understand there is a grand military road from San Juan on the north to Ponce on the south," observed Leander. "The road travels over mountains over four thousand feet high. More than likely this road passes near the big caves."

For two days the wind blew at a lively rate and then toward night it seemed to die out utterly. They were now down to 24° north latitude, and the atmosphere was stifling.

"Finding that treasure is going to be hot work," observed Dick, as he mixed glasses of iced lemonade for himself and the others. "I reckon we'll earn what we get."

"How would you like to sail up to the frozen North?" suggested Leander.

"Well, we stood the ice and snow all right enough last winter."

"So we did. But still, I don't mind this so very much."