At nine o'clock it began to rain. The wind, steadily growing stronger, rattled the windowpanes.

"I'm afraid this will be a noisy place tonight," commented Mr. Nichols.

"But I'm drowsy enough to sleep through anything."

Mrs. Masterbrook had retired soon after the dishes were washed. After getting himself a drink in the kitchen, Mr. Nichols announced that he too was going to bed.

"I'll be coming along in a few minutes," Penny said. "How about the doors? Shall I lock them?"

"Oh, it wouldn't do any harm," replied the detective carelessly. "But on a night like this there's no chance anyone will visit us----"

Mr. Nichols' voice trailed slowly away. As if in contradiction to his words, there came a sharp rap on the door.

CHAPTER VI

The Attic Door

"It seems that you are wrong, Dad," commented Penny dryly. "Already we have a visitor."

Mr. Nichols went to the door and flung it open. The light revealed a bedraggled young man who might have been in his early twenties. He was not very well dressed and his clothes were rain soaked. Penny and her father regarded the stranger a trifle suspiciously until he spoke.

"I beg your pardon," the young man said apologetically, "but I am looking for the Herman Crocker place. Would you be kind enough to direct me?"

"Why, certainly," replied the detective. "Come in out of the rain, won't you?"

"Thanks, but my shoes are covered with mud."

"You can't harm anything in this cottage," said Penny. "Come right in."

The young man stepped over the threshold, removing his limp felt hat.

He had sandy hair, Penny observed, and penetrating blue eyes which roved swiftly about the room.

"It's a nasty night," said Mr. Nichols. "Have you walked far?"

"All the way from Kendon."

"Then you went right past Herman Crocker's place. It's a large house to the left of the road."

"The rain is coming down so fast I couldn't see very far ahead of me,"

the young man replied. "This was the first light I saw along the way."

"It may be that Mr. Crocker has gone to bed," Penny remarked. "I imagine he retires early."

"Will he be expecting you?" inquired the detective.

"Why, no, he won't," the young man replied after a slight hesitation.

"I suspect he'll be very much surprised to see me."

"We have a telephone," Penny said. "If you like, I'll call Mr. Crocker for you. He might be willing to drive up and get you."

"Oh, please don't go to any bother," returned the young man quickly, edging toward the door again.

"It won't be any trouble at all."

"Please, I'd rather you wouldn't. I'll not mind the walk."

Penny glanced sharply at the young man. It was plain to see that he had some special motive for not wishing to give Herman Crocker advance notice of his arrival in the community.

Without having any real reason for such a belief, it suddenly struck Penny that the young man's visit might have some connection with the mysterious call which Walter Crocker had made upon his uncle.

"I take it you're a stranger in these parts," remarked Mr. Nichols. He too was studying the young man curiously.

"Well, yes, I am. I'm here to see Mr. Crocker on rather important business."

"You'll be his second out-of-town visitor this week," Penny commented in a casual tone. "Mr. Crocker's nephew was here, but I understand he has gone back to the city."

"Mr. Crocker's nephew?" asked the young man quickly.

"Yes," said Penny, watching him closely. "Walter Crocker."

A strange look came into the young man's eyes. An expression of astonishment gave way to one of wariness.

"You are acquainted with Walter Crocker perhaps?" asked Penny, ignoring her father's warning glance.

"I have heard of him," replied the young man after a brief hesitation.

He turned once more toward the door.

As he opened it a strong gust of wind blew a sheet of rain into the room.

"See here, you can't go out in that," said Mr. Nichols firmly. "Let me telephone Crocker and tell him you're here."

The young man shook his head.

"Then I'll put on chains and take you down there in my car."

"No, I'd rather not have you go to any bother on my account. I don't mind a little rain."

"It's blowing a gale and the storm is getting worse every minute," the detective insisted. "Herman Crocker keeps a vicious dog too. If you walk in there without being expected, you may receive an unpleasant reception."

"I wasn't looking for a very cordial one anyway," the young man said slowly. "But thanks for the tip about the dog. Maybe it would be just as well to go back to town for the night."

"There's no need to do that," said Mr. Nichols. "You're welcome to stay here if you like. Our quarters aren't very luxurious, but at least it will be better than walking back to the village."

"I'll get Mrs. Masterbrook to help me fix up one of the bedrooms right away," Penny added quickly.

"It's very kind of you," said the young man, looking troubled. "You know nothing about me----"