"Where are we going?" she whispered.
"We're going to the tunnel to save your father," answered Roddy.
The girl gave a little sigh of content and again sank back into the shelter of his arm.
They passed the fortress, giving it a wide berth, and turned in toward the shore. The city now lay far to the right, and the clamor of the conflict came to them but faintly.
"Tell me," said Roddy, "why did you come to the wharf?" He seemed to be speaking of something that had happened far back in the past, of a matter which he remembered as having once been of vivid importance, but which now was of consequence only in that it concerned her.
Reluctantly Inez broke the silence that had enveloped them.
"They came to the house and arrested Pedro," she said. To her also the subject seemed to be of but little interest. She spoke as though it were only with an effort she could recall the details. "I knew you needed him to convince father you were friends. So, as he could not come, I came. Did I do right?"
"Whatever you do is right," answered Roddy. "We might as well start life with that proposition as a fixed fact."
"And do you want me with you now?" whispered the girl.
"Do I want you with me!" Roddy exclaimed, in mock exasperation. "Don't provoke me!" he cried. "I am trying," he protested, "to do my duty, while what I would like to do is to point this boat the other way, and elope with you to Curacao. So, if you love your father, don't make yourself any more distractingly attractive than you are at this moment. If you don't help me to be strong I will run away with you."
Inez laughed, softly and happily, and, leaning toward him, kissed him.
"That's not helping me!" protested Roddy.
"It is for the last time," said Inez, "until my father is free."
"That may not be for months!" cried Roddy.
"It is for the last time," repeated Inez.
Roddy concealed the launch in the cove below El Morro and, taking from the locker a flask of brandy and an extra torch, led the way up the hill. When they drew near to the fortress, fearing a possible ambush, he left Inez and proceeded alone to reconnoitre. But El Morro was undisturbed, and as he and McKildrick had left it. He returned for Inez, and at the mouth of the tunnel halted and pointed to a place well suited for concealment.
"You will wait there," he commanded.
"No," returned the girl quietly, "I will go with you. You forget I am your sponsor, and," she added gently, "I am more than that. After this, where you go, I go."
As she spoke there came from the wharf of the custom-house, lying a mile below them, a flash of flame. It was followed by others, and instantly, like an echo, the guns of the fort replied.
"Shrapnel!" cried Roddy. "They've captured the artillery barracks, and we haven't a moment to lose!"
He threw himself on the levers that moved the slabs of stone and forced them apart. Giving Inez his hand, he ran with her down the steps of the tunnel.
"But why," cried Inez, "is there more need for haste now than before?"
Roddy could not tell her the assault of the Rojas party on the fortress might lead to a reprisal in the assassination of her father.
"The sound of the cannon," he answered evasively, "will drown out what we do."
Roddy was now more familiar with the various windings of the tunnel, and they advanced quickly. Following the circles of light cast by their torches, they moved so rapidly that when they reached the wall both were panting. Roddy held his watch in front of the light and cried out with impatience.
"Ten minutes!" he exclaimed, "and every minute--" He checked himself and turned to the wall. The dynamite, with the cap and fuse attached, was as McKildrick had placed it. For a tamp he scooped up from the surface of the tunnel a handful of clay, and this he packed tightly over the cap, leaving the fuse free. He led Inez back to a safe distance from the wall, and there, with eyes fastened on Roddy's watch, they waited. The seconds dragged interminably. Neither spoke, and the silence of the tunnel weighed upon them like the silence of a grave. But even buried as they were many feet beneath the ramparts, they could hear above them the reverberations of the cannon.
"They are firing in half-minute intervals," whispered Roddy. "I will try to set off the dynamite when they fire, so that in the casements, at least, no one will hear me. When the explosion comes," he directed, "wait until I call you, and if I shout to you to run, for God's sake,"
he entreated, "don't delay an instant, but make for the mouth of the tunnel."
Inez answered him in a tone of deep reproach. "You are speaking," she said, "to a daughter of General Rojas." Her voice trembled, but, as Roddy knew, it trembled from excitement. "You must not think of _me_,"
commanded the girl. "I am here to help, not to be a burden. And," she added gently, her love speaking to him in her voice, "we leave this place together, or not at all."
Her presence had already shaken Roddy, and now her words made the necessity of leaving her seem a sacrifice too great to be required of him. Almost brusquely, he started from her.
"I must go," he whispered. "Wish me good luck for your father."
"May God preserve you both!" answered the girl.
As he walked away Roddy turned and shifted his light for what he knew might be his last look at her. He saw her, standing erect as a lance, her eyes flashing. Her lips were moving and upon her breast her fingers traced the sign of the cross.
[Illustration: Her fingers traced the sign of the cross.]
Roddy waited until his watch showed a minute to nine o'clock. To meet the report of the next gun, he delayed a half-minute longer, and then lit the fuse, and, running back, flattened himself against the side of the tunnel. There was at last a dull, rumbling roar and a great crash of falling rock. Roddy raced to the sound and saw in the wall a gaping, black hole. Through it, from the other side, lights showed dimly. In the tunnel he was choked with a cloud of powdered cement. He leaped through this and, stumbling over a mass of broken stone, found himself in the cell. Except for the breach in the wall the explosion had in no way disturbed it. The furniture was in place, a book lay untouched upon the table; in the draft from the tunnel the candles flickered drunkenly. But of the man for whom he sought, for whom he was risking his life, there was no sign. With a cry of amazement and alarm Roddy ran to the iron door of the cell. It was locked and bolted. Now that the wall no longer deadened the sound his ears were assailed by all the fierce clamor of the battle. Rolling toward him down the stone corridor came the splitting roar of the siege guns, the rattle of rifle fire, the shouts of men. Against these sounds, he recognized that the noise of the explosion had carried no farther than the limits of the cell, or had been confused with the tumult overhead. He knew, therefore, that from that source he need not fear discovery. But in the light of the greater fact that his attempt at rescue had failed, his own immediate safety became of little consequence. He turned and peered more closely into each corner of the cell. The clouds of cement thrown up by the dynamite had settled; and, hidden by the table, Roddy now saw, huddled on the stone floor, with his back against the wall, the figure of a man. With a cry of relief and concern, Roddy ran toward him and flashed his torch. It was Vicenti. The face of the young doctor was bloodless, his eyes wild and staring. He raised them imploringly.
"Go!" he whispered. His voice was weak and racked with pain. "Some one has betrayed us. They know everything!"
Roddy exclaimed furiously, and, for an instant, his mind was torn with doubts.
"And you!" he demanded. "Why are you here?"
Vicenti, reading the suspicion in his eyes, raised his hands; the pantomime was sufficiently eloquent. In deep circles around his wrists were new, raw wounds.
"They tried to make me tell," he whispered. "They think you're coming in the launch. You, with the others. When I wouldn't answer, they put me here. It was their jest. You were to find me instead of the other.
They are waiting now on the ramparts above us, waiting for you to come in the launch. They know nothing of the tunnel."
Roddy's eyes were fixed in horror on the bleeding wrists.
"They tortured you!" he cried.
"I fainted. When I came to," whispered the doctor, "I found myself locked in here. For God's sake," he pleaded, "save yourself!"
"And Rojas?" demanded Roddy.
"That is impossible!" returned Vicenti, answering Roddy's thought. "He is in another cell, far removed, the last one, in this corridor."
"In _this_ corridor!" demanded Roddy.
Vicenti feebly reached out his hand and seized Roddy's arm.
"It is impossible!" he pleaded. "You can't get out of this cell."
"I will get out of it the same way I got in," answered Roddy. "Can you walk?"