"You didn't learn anything, did you?" Penny inquired as they drove on again.

"Not very much. Government men never will talk. But they did admit they were here trying to locate James Kippenberg."

"Then they think he is in the locality."

"They had an idea he would show up at his daughter's wedding. But it didn't turn out that way."

"Did you say anything to them about Grant Atherwald's disappearance?"

"Yes, but they wouldn't discuss it. They said they had nothing to do with the case."

Penny lapsed into reflective silence as the car went on toward Andover.

Mentally she sorted over the evidence which she had gathered that day, trying to fit it into a definite pattern.

"Jerry," she said at last.

"Yes?"

"You'll probably laugh at this, but I have a theory about Grant Atherwald's disappearance."

"Go ahead, spill it."

"Yesterday when Salt and I were waiting at the drawbridge we saw a motorboat cruise down the river. It was driven by a burly looking fellow who paid no heed when we tried to hail him."

"You're not suggesting that the man may have had something to do with Atherwald's disappearance?" Jerry questioned, mildly amused.

"I knew you would laugh."

"Your theory sounds pretty far-fetched to me, I'll admit. It happens there are any number of burly, tough looking boatmen on the Kobalt. You can't arrest a man for a crime just because of his appearance."

"All the same, there is supporting evidence. Mrs. Latch told me that Atherwald's note had been handed to her by a boy who in turn received it from someone in a boat."

"Boats are rather common too. Your theory is interesting, but that's all I can say for it."

"All right," said Penny. "I was about to tell you another idea of mine.

Now I won't do it."

No amount of coaxing could induce her to reveal her thought, and the remainder of the drive to Andover was made in silence. It was well after five-thirty when the car finally drew up in front of the City Club.

Penny was not surprised to find the doors locked and no sign of Louise or Miss Frome.

"I thought they would go home without me," she said to Jerry. "I only wanted to make certain."

For many miles the road led through pleasant countryside and then swung back toward the Kobalt river. The sun had dropped below the horizon by the time the automobile sped through the town of Claxton.

"Thirty miles still to go," Jerry sighed. "I'm getting hungry."

"Two souls with but a single thought," remarked Penny.

Directly ahead they noticed an electric sign which drew attention to a roadside gasoline station with an adjoining restaurant. Jerry eased on the brake.

"How about it, Penny? Shall we invest a few nickels?"

"I could do with a sandwich," Penny agreed. "Several, in fact."

Not until Jerry had parked the car did they notice the dilapidated condition of the building. It stood perhaps fifty yards back from the main road, its rear porch fronting on the Kobalt.

"Strange how one is always running into the river," Penny remarked absently. "It seems to twist itself over half the state."

Jerry had not heard her words. He was gazing at the restaurant with disapproval.

"This place doesn't look so good, Penny. If you say the word we'll drive on."

"Oh, I'd brave anything for a beef barbecue," she laughed.

Through the screen door they caught a discouraging glimpse of the cafe's interior--dingy walls, cigarette smoke, a group of rough looking men seated on stools at the counter. Upon the threshold Penny hesitated, losing courage.

"Let's not go in," Jerry grunted in an undertone. "They'll probably serve c.o.c.kroaches in the sandwiches."

Penny half turned away from the door only to stop short. Her attention focused upon two men who were sitting at the far end of the cafe drinking coffee from heavy mugs. In the indistinct light she could not be absolutely sure, yet she was instantly convinced that the heavy-set fellow in shirt sleeves was the same boatman who had been seen near the Kippenberg estate.

To Jerry's surprise, Penny resisted the tug of his arm as he sought to lead her toward the car.

"This place isn't half bad," she said. "Let's try it and see what happens."

Boldly she reached for the k.n.o.b of the screen door and entered the cafe.

CHAPTER 13 _TWO MEN AND A BOAT_

Penny ignored several empty tables at the front of the dreary restaurant and selected one not far from where the two men sat. As they glanced at her with insolent, appraising eyes, her pulse quickened. She was almost certain that the heavy-set man was the same fellow she had noticed near the Kippenberg estate.

A waiter in a soiled white ap.r.o.n shuffled up to take their order.

"Hot roast beef sandwich and coffee," said Jerry. "With plenty of cream."

"Make mine the same," added Penny without looking at the menu.

All her attention centered upon the two men who were now talking together in low tones. After the first glance they had taken no interest in her and were unaware of her scrutiny. The heavy-set man bent nearer his companion and with the point of his knife drew a pattern on the tablecloth.

"What do you think of this route, Joe?" he asked.

"Too risky," the other muttered. "Once we start we got to make a quick shoot to the sea."

"Any way we take we might run into trouble. Y'know, I wish we had never agreed to do the job."