"Oh, yes, they were lying on the ground. For an hour they scarcely moved."

"Didn't you tell Fenestra?"

"I was afraid to do it, but I think he knew. All day he kept inside the house, and I saw him at the windows. He was as jumpy as a cat. Another thing--I saw him loading his revolver."

"He must fear for his life."

"I'm sure of it, Penny. Even if he's only going to the barn he carries the revolver with him."

A clock on the shelf above the stove struck eight times.

"Mercy!" exclaimed Tillie, "I must hurry or I'll never get away before Old Peter returns. Excuse me while I run upstairs for my suitcase."

"Where is Fenestra now?" Penny inquired before the girl could leave.

"In Riverview I suppose. He went away right after supper."

"Run along and get your suitcase," Penny advised. "I'll drive you into town."

"Oh, thanks," the girl answered gratefully. "It won't take me long."

After Tillie had gone, Penny walked to the window and rolled up the blind. Across the yard she could see the disfiguring mound of earth and cement. What secret did the storm cave guard? Why was it always kept padlocked?

Abruptly she went to the foot of the stairs and called:

"Oh, Tillie, I'm going outside for a minute. I'll come back."

"All right," agreed the girl. "Sorry to keep you waiting but I still have a few things to pick up."

Leaving by the side door, Penny paused on the porch for a moment.

Carefully she glanced about the yard and surrounding fields. A thin quarter moon rising over the pine trees gave dim shape to the barn and silo. She could see no one, yet Tillie's revelation that strange men spied upon the house, made her attentive to danger.

Swiftly she crossed the lawn to the storm cave. As she had fully expected, the slanting door was padlocked.

"Oh, shoot!" she exclaimed impatiently. "I want to get down there!"

She jerked at the padlock several times, and then accepting the situation, turned toward the house. As she walked, Penny's eyes fastened absently upon a clump of lilac bushes some twenty yards from the cave.

They were moving gently as if stirred by a wind. Yet there was no wind.

Penny did not pause, but every sense became alert. Her heart pounded.

Distinctly she could see a man crawling on hands and knees behind the lilacs.

CHAPTER 16 _BEHIND THE LILACS_

Without disclosing by her actions that she had observed anything amiss, Penny walked steadily on toward the house. Her first thought had been that it was Peter Fenestra who spied upon her. However, as the figure straightened she knew she had been mistaken. The man was not Fenestra.

Before she could see his face, he moved to another clump of bushes, and then was enveloped by darkness.

Entering the house, Penny blew out the kerosene lamp and stood by the window, watching. She could not see the man. He had vanished completely.

"That proves that Tillie was correct," she thought. "This house _is_ being watched. I wonder why."

As she waited, Tillie came down the stairway, carrying her luggage.

Observing that the kitchen was dark, she paused in alarm.

"It's all right," Penny called rea.s.suringly. "I blew the light out so that I wouldn't be seen from outside."

"Is anyone there?" Tillie demanded, coming quickly to the window. Her pallid features were rigid with fear and her breathing quickened.

"He's gone now, I think."

"There was someone a moment ago?"

"Yes, a man, hiding behind the lilacs. I believe he must have been watching the house--or possibly the storm cellar!"

"Then you see I was right," Tillie declared. "Oh, this is a dreadful place, and I'll be glad to leave it."

"I almost wish you were staying," said Penny slowly. "You might be able to learn what's hidden in that cave."

"Not with Peter Fenestra so suspicious. Anyway, you couldn't hire me to remain even if he would allow it. I'd rather starve."

"You have no place to go, Tillie?"

"I'll find work. If not in Riverview then I can return to the country.

Anything will be better than what I've had."

Penny groped in the dark for the lamp, relighting it.

"Tillie," she said, "how would you like to work at our place for a few days?"

"You don't mean it."

"I do if it can be arranged," Penny affirmed. "We have a housekeeper, but it occurred to me that she might take your place here."

"She'd be very foolish to give up a good job for this."

"It would only be temporary. I think I can induce her to make the change for a few days. The question is, can we get Peter Fenestra to accept her?"

"I doubt if he'll hire anyone now that I am leaving. Why do you want your housekeeper in such a place as this, Penny?"

"Only for one reason. To learn what's going on here. I confess you've made me very curious about the storm cave."

"Fenestra would watch her every minute, the same as he did me. It won't work."

"It will if Mrs. Weems can get the job," declared Penny confidently.