"Because," answered Carl Baldwin slowly, "she is not ours to take, and even if she were, we would not be allowed to use her in any such fashion. The Government would not permit us."

"But if she were ours. If the Professor would consent to allow us to attempt the experiment. If we could escape the vigilance of the American cruisers, and manage to convey our marvel of marvels to the scene of action, would you not join in the enterprise, my Carol? Would you not aid in striking the blow for freedom?"

"It would certainly be most interesting to test the little craft in actual service," replied the young American cautiously.

"Interesting, say you? It is of vital importance. What she has done is nothing. Who knows what she may accomplish? When will there come another such chance for trying her in warfare? Where in the world is there a prize to be gained equal in value to that of a free Cuba? That my father has sacrificed all but life itself for her is my proudest boast; that I may soon fight by his side, my[!-- [Pg 4] --] fondest hope. Oh, if you cold-blooded Americans could but witness the cruelty, the oppression, the despair, the horror of it all. But, if I cannot win over my dearest friend among them, how may I hope to persuade others? Ah, Dios! it is hard, it is bitter, it is pitiful, that but for want of a single helping hand all should be lost."

At this point the young Cuban's feelings so overpowered him that words failed to express them, and as Carl Baldwin's policy was to remain silent during these outbursts, the lads reached the school building in which they lodged without further conversation.

Since Carlos Moranza had left home, the affairs of his native land had come to a sorry pass. The struggle for freedom had begun. Spanish armies devastated the fair island, killing its inhabitants, laying waste their fields, and destroying their homes, while Spanish war-ships patrolled its coasts to cut off all outside aid from the insurgents.

The latter, devoid of nearly everything necessary for carrying on a war, save a desperate determination to resist to the death, occupied the interior of the island, where they found impregnable strongholds amid its rugged mountains and dense forests. The sympathies of the American people were with them, and expeditions for their relief were constantly fitting out in the southern ports of the United States. Many of these failed to reach their destination, since international law compelled the Government to prevent them from sailing, if possible. Thus, in addition to the Spanish fleet patrolling the Cuban coasts, the southern waters of the United States were guarded by an equally numerous fleet of American men-of-war and vessels of its revenue marine.

From the very outset of the war Don Cæsar Moranza, after placing his only daughter, Catina, who was two years younger than Carlos, in what he conceived to be a safe retreat, had linked his fortunes with those who fought for liberty. He had quickly risen to the command of a[!-- [Pg 5] --] Cuban army, and, as General Moranza, the dashing cavalry leader, proved such a terror to the Spaniards, that to capture him became an important object of their campaigns.

With all the impetuosity of his nature Carlos longed to take part in the glorious struggle, and, in every letter that he found means of transmitting to his father, pleaded to be allowed to join him. Thus far his petitions had been denied on the ground that he would still have ample opportunity for fighting after he had become a skilled engineer. In the meantime he could do much for the cause where he was, and must remember that to perfect himself in his chosen profession would be of greater value to Cuba than the winning of a battle. This stimulant was what made young Moranza one of the most brilliant scholars in the Baldwin Polytechnic; for he felt that every problem solved was a blow struck for his country. At the time of the Mermaid's successful trial trip, in which the young Cuban had been allowed to participate as a distinguished reward of merit, he had received no word from his father or sister for many weeks, and so was filled with anxiety concerning them.

As the lads reached the school they separated, Carlos proceeding directly to his room, and the other going in search of Professor Rivers to report the safe housing of the Mermaid. The Professor was so buried in thought that for a few moments he apparently took no notice of Carl's entrance. Suddenly, lifting his head and looking squarely at the lad, he exclaimed—