"So you did," she a.s.sented with a touch of her old demureness, "but that doesn't say that I stayed there."

"I see it doesn't," he replied. "But why didn't you?"

"I guess it's because I'm not used to obeying anybody except my father," she answered evasively.

"Tell me the real reason."

"Well," she said, driven to bay, "I was afraid there might be something dangerous in here and--and--I didn't want you to have to face it alone--and"--here she paused.

Drew's heart beat wildly.

"And so you came in to stand by my side," he said with emotion. "Ruth, Ruth----"

"But now," said Ruth hastily, following up her advantage, "we must hurry and get back to the others. Father will begin to worry about me."

Anguish smote Drew. Ruth had evidently not the slightest idea that anything stood between her and freedom. How could he break the dreadful news to her? He felt like an executioner compelled by some awful fate to slay the one he loved most dearly.

"You mustn't look at me after we get outside until I've had a chance to arrange my hair," she warned him gaily. "I must look a perfect fright."

Every innocent word was a stab that went straight to the man's heart.

His mind was a tumult of warring emotions. At first there had been a wild delight when he had found himself in the presence of his heart's desire, after he feared that he would never hear her voice again. In the excitement of bringing her back to consciousness and listening to her story, the fearful peril in which they stood had been relegated to the background. Now it came back at him with re-doubled force, and he had to close his lips tightly to suppress a groan.

He could have died alone, if escape had proved impossible, and met death like a man. But to have to watch Ruth die--die perhaps after enduring unspeakable suffering--the mere thought threatened to drive him mad.

And she was here because she had feared that he might encounter danger and wanted to meet it at his side when it came. But for that courageous impulse, she might at this moment be safe and sound out under the open sky instead of being buried alive in this island tomb.

Moreover her very presence here made their danger all the greater.

There was little chance now of help coming to them from the outside.

No doubt Tyke and Captain Hamilton would grow uneasy at their absence and look them up--probably they were hunting for them now. But they did not know of the existence of the cave, and now that the entrance was closed there was not the slightest chance of finding them. They would explore the mountain side, search every foot of the island, but their quest would be doomed to failure from the beginning.

While these thoughts had been hurrying through his tortured brain, Ruth had arranged her disordered hair as best she could in the darkness and stood ready to go.

"Well, Allen, what are we waiting for?" she asked. "You men are always complaining that the girls keep you waiting, but this time you're the guilty one."

He tried to adopt her bantering mood, but failed miserably.

"I'll have to throw myself on your mercy," he said. "But wait here a moment, Ruth, till I see if the path is clear."

Even in the darkness, he was almost conscious that she looked at him in surprise. But he needed time to get his thoughts together and decide on the easiest way of breaking the terrible news that weighed on his heart.

He cudgeled his brain to find the gentlest, most rea.s.suring phrases that would alarm her least and keep up her courage. But there was the stark, hideous fact that could not be blinked or dodged, and when at last his lagging steps returned, he was no nearer a solution of his problem than before.

"I declare you sound like Tyke coming along the pa.s.sage," Ruth laughed merrily. "They say bad news travels fast. So your news must be good, or you wouldn't be coming so slowly."

"I only wish you were right," he said, grasping at the opening. "But to tell the truth my news isn't any too good. Oh, nothing to be alarmed about," he added hastily, as he caught her stifled exclamation.

"A little loose earth seems to have come down the slope of the hill and blocked up the entrance. I'll get to work at it and clear it out in a jiffy."

He tried to throw a world of confidence into his tone, but it failed to ring true. In the darkness he heard Ruth catch her breath.

"Let's go and see just how bad it is," was all she said, and Drew with a chill in his heart, led the way.

"What is this dirt in here?" asked Ruth, as she stumbled over a mound that Allen had thrown behind him in his frantic digging.

"Oh, that's some that I've dug out already," Allen replied with a.s.sumed carelessness. "I just wanted to find out how hard the dirt was and whether it would give way easily. It's fresh and soft and we'll get the whole lot out of our way in no time."

He was about to start in again at the task when Ruth laid her hand upon his arm.

"You didn't dig all this out in that minute you were away from me just now," she said quietly. "You must have been working while I lay in there unconscious. Come now, Allen, tell me the whole truth. Remember that I am a sailor's daughter and am not afraid to face things, no matter how bad they may be. The cave entrance is badly blocked up, isn't it?"

"G.o.d bless your staunch, plucky heart, Ruth," blurted out Drew, his own heart kindling at her courage. "You're one woman in a thousand, yes, in a million. I might have known you'd face the truth without weeping or hysterics. You're right about the landfall. I'm afraid it's a heavy one. I've been digging at it for some time without making much impression. But after all it's all guess-work and it may not be so thick as it seems to be. We may let daylight through at any minute.

At any rate I'm going at it like a tiger. I worked hard before when I thought I was alone, but now that I've got you to look out for I'll do ten times as much. I've only begun to fight. We're just going to get out of this and that's all there is about it."

"And I'll help you," cried Ruth.

"Not with those little hands," replied the man vehemently. "You just stand back there and pray while I do the work."

"Those little hands, as you call them, are stronger than you think.

I'm going to work with all my might and help you out. And that won't keep me from praying either. I guess the cave women used to work and fight just about as much as the men, and I'm a cave woman now if I never was before."

Again Drew sought to deter her, but she was determined and he had to let her have her way. The only concession he could gain was to make her put on a pair of buckskin gloves that dangled at his belt. They were woefully large for her shapely hands and at any other time would have furnished a subject for jesting. But nothing now was further from their minds than laughter. They were engaged on a grim work of life or death and both of them knew it.

But though brave, there was a limit to Ruth's physical strength, and under such strenuous and unaccustomed effort it was not long before that limit was reached. Drew discerned it coming before Ruth herself would admit it.

He took her gently but firmly by both wrists and fairly compelled her to sit down on one of the mounds, where he improvised a seat that enabled her to rest her back against one side of the cave. Then he returned to the work with redoubled vigor, tossing the dirt aside as though he were a tireless steam shovel.

But though Ruth's body was resting, her mind was working actively, darting hither and thither in an effort to find a way of escape from their fearful predicament.

"Allen," she said, as he stopped for an instant to rest, "come here and sit down beside me."

He had never hesitated before at accepting that coveted invitation, but just now he wondered whether he ought to stop even for an instant. His herculean efforts had brought him to the very edge of collapse, but he was feverishly eager to keep on.

"Ought I, Ruth?" he questioned. "Every minute now is precious, you know."

"I know it," she admitted, "but you'll drop dead from exhaustion if you don't stop and rest. You must rest."

The gentle tyrant had her way and Drew yielded. He sat down beside her, his chest contracting and expanding under the stress of his labored breathing.

"Poor boy!" she said softly, and Drew thrilled at the sympathy in her tone.

"I've been thinking, Allen, that perhaps we had better not rely entirely on your digging for getting out of here," she continued.

"It's all a guess as to how thick that wall of earth and rock is, and we may be using on it the strength that we need for other things. If you had an implement of some kind it would be different. But with your bare hands together with what little help I can give you it may be impossible."

"Yes," he was forced to concede, "I can't go on forever. Sooner or later my strength will give out. But what can we do but keep on trying? I'd go raving mad if I didn't keep on taking the one little chance we have."

"But is it the only chance we have?" she argued. "Did you bring your revolver with you?"

For answer he took it out of his belt and put it in her hand.