The naturalist had by this time reached the ground and was going along carefully back of the house. He drew his revolver and, pointing it down, fired. Then he dodged back of an extension and disappeared for the moment.

Instantly, the three men sprang up and ran toward the spot where it seemed the shot had been fired. There was no one about the side of the house. But the wind had carried the smoke into some bushes beside the grove and they crashed into the bushes, beating about.

At the same time, the naturalist, having first waited until he saw which way the men were going, dashed about the house in the opposite direction. Then he slipped, unopposed and un.o.bserved, in through the open front door, up the stairs and along to the room into which he had just been looking. He unlocked the door, and entered. Elaine was still struggling with the cords when she caught sight of the stranger.

"Not a word," he cautioned under his breath.

She was indeed too frightened to cry out. Quickly, he loosened her, still holding his finger to his lips to enjoin silence.

"Follow me," he whispered.

She obeyed mechanically, and they went out into the hall. On down-stairs went the naturalist, Elaine still keeping close after him.

He looked out through the front door, then drew back. Quickly he went through the lower hall until he came to the back door in the kitchen, Elaine following. He unbolted the door and opened it.

"Run," he said, simply, pointing out of the door. "They're coming back the other way. I'll hold them."

She needed no further urging, but darted from the house as he closed the door after her.

It was just at this point that Del Mar came riding along the main road on horseback. He pulled up suddenly as he saw a car run in alongside the road.

"That's Elaine's runabout," he muttered, as he dismounted and tied his horse. "How came it here?"

He approached the car, much worried by its unaccountable presence there instead of before the St. Germain. Then he drew his gun and hurried up the side road.

He heard a shot and quickened his pace. In the woods unexpectedly he came upon his three men still beating about, searching with drawn revolvers for the person who had fired the shot.

"Well?" he demanded sharply, "what's all this?"

"Some one fired a shot," they explained, somewhat crestfallen.

"It was a trick, you fools," he answered testily. "Get back to your prisoner."

Without a word they turned and hurried toward the house, Del Mar following. "You two go in," he ordered the foremost. "I'll go around the house with Patrick."

As Del Mar and the other man ran around the corner, they could just catch a fleeting glimpse on some one disappearing among the trees.

It was Elaine.

The man hurried forward, blazing away with his gun.

Running, breathless, Elaine heard the shot behind her which Del Mar's man had fired in his eagerness. The bullet struck a tree near her with a "ping!" She glanced back and saw the man. But she did not stop.

Instead, she redoubled her efforts, running zigzag in among the trees where they were thickest.

Del Mar, a little bit behind his man where she could not recognize him, urged the man on, following carefully.

On fled Elaine, her heart beating fast. Suddenly she stopped and almost cried out in vexation. A stream blocked her retreat, a stream, swift and deep.

She looked back, terrified. Her pursuers were coming ahead fast now in her direction. Wildly she gazed around. There was a canoe on the bank.

In an instant she jumped in, untied it, and seized the paddle. Off she went, striking for the opposite sh.o.r.e. But the current was racing swiftly, and she was already tired and exhausted. She could scarcely make any headway at all in the fierce eddies. But at least, she thought hurriedly, she was getting further and further away from them down-stream.

Up above, Del Mar and his man came to the edge of the water. There they stood for a moment looking down.

"There she is," pointed the man.

Del Mar raised his revolver and fired.

Suddenly a bullet struck Elaine's paddle and broke it. Clutching the useless splintered shaft, she was now at the mercy of the current, swept along like a piece of driftwood.

She looked about frantically. What was that roaring noise?

It was the waterfalls ahead!

In the meantime, Del Mar's other two men had entered the house and had run up-stairs, knowing well his wrath if anything had happened. As they did so, the naturalist poked his head cautiously out of the kitchen where he had been hiding, and saw them. Then he followed noiselessly, his revolver ready.

Headlong they ran into the room where they had left Elaine. She was gone!

Before they could turn, the naturalist locked the door, turned and took the steps down, two at a time.

Then he ran out of the front door and into the woods at an angle to the direction taken by Elaine, turning and going down hill, where a rapid, swollen stream curved about through a gorge. As he reached the stream, he heard a shot above, and a scream.

He looked up. There was Elaine, swept down toward him. Below he knew the stream tumbled over a tall cataract into the gorge below.

What could he do?

A sudden crackling of the twigs caused him to turn and catch sight of me, just coming up.

For, as best I could on horseback, I had followed Elaine's car until at last I saw that it had been abandoned. Thoroughly alarmed, I rode on, past a deserted house until suddenly I heard a shot and a scream. It seemed to come from below me and I leaped off my horse, making for it as fast as I could, racing toward a stream whose roar I could hear.

There on the bank I came upon a queer old codger, looking about wildly.

Was he the automobile thief? I ran forward, ready to seize him. But as I did so, he whirled about and with a strength remarkable in one so old seized my own wrist before I could get his.

"Look!" he cried simply, pointing up the stream.

I did. A girl in a canoe was coming down toward the falls, screaming, her paddle broken and useless. My heart leaped into my mouth. It was Elaine!

"Come," he panted eagerly to me. "I can save her. You must do just as I say."

He pointed to an overhanging rock near-by and we ran to it.

By this time Elaine was almost upon us, each second getting nearer the veritable maelstrom above the falls.

From the rock overhung also a tree at the very edge of the water.

There was nothing to do but obey him. Above, though we did not see them, Del Mar and his man were gloating over the result of their work.